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Delicious Japanese Onion Soup Recipes – A Soul-Soothing Elegance

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“Dive into a bowl of serenity with our Japanese Onion Soup, where simplicity meets elegance. This delicate broth, infused with the sweet essence of caramelized onions, whispers tales of Japanese culinary tradition. Dashes of soy and miso meld seamlessly, creating a symphony of umami that dances gracefully on the palate. Touched by a sprinkle of scallions and mushrooms, each sip is a tranquil journey through the Land of the Rising Sun. Embrace the zen of flavors with this soul-soothing, exquisite soup!”

Immerse yourself in a warm, aromatic bowl of Japanese Onion Soup Recipes, a light yet flavor-packed broth that beautifully blends the subtlety of the East. Savor the delicate balance of sweet onions and savory miso, harmoniously concocted to intrigue your palate.

Japanese Onion Soup

 As the first spoonful touches your lips, imagine the bustling streets of Tokyo and the tranquil Zen gardens, echoing the cultural symphony that is Japan. Health-focused gourmets will appreciate the beneficial attributes of this comforting broth. 

Dive into this story as we traverse the culinary landscape of Japan, unlocking the tempting layers of the seemingly simple Japanese Onion Soup.

What Is Japanese Onion Soup?

Japanese Onion Soup, also known as ‘Hibachi Soup,’ is a flavorful, light, clear broth often served as a starter in Japanese cuisine.

It combines the gentle sweetness of thinly sliced onions with the savory richness of chicken or vegetable broth, topped with finely chopped spring onions and mushrooms.

 It differs from its French counterpart by being less concentrated and without cheese. A traditional comfort food in Japan, this soup is loved for its simplicity, subtle flavors, and healthful properties, delivering a warm, satisfying experience with each spoonful.

History Of Japanese Onion Soup

The roots of Japanese Onion Soup, akin to many Japanese dishes, are deeply intertwined with the country’s rich cultural history.

Stemming from the Buddhist tradition of vegetarianism, this light, clear broth evolved over centuries, embodying Japan’s philosophy of simplicity and naturalness in cuisine. 

It hails from the traditional ‘Ichiju Sansai’ meal structure, translating to ‘one soup, three dishes,’ emphasizing balanced nutrition.

Although the soup’s popularity in Westernized Japanese or Hibachi restaurants is recent, its true origin remains humble, utilizing everyday ingredients like onions and mushrooms. 

The Japanese Onion Soup is a testament to Japan’s culinary refinement and reverence for nature.

Interesting Facts About Japanese Onion Soup 

  • Traditional Japanese meal structure: Japanese Onion Soup embodies the traditional ‘Ichiju Sansai’ meal structure, meaning ‘one soup, three dishes.’ It’s an essential part of this balanced and nutritionally rich diet.
  • Vegetarian origins: Originated from Buddhist traditions, the soup is originally vegetarian, underlining the country’s focus on plant-based ingredients and overall health.
  • Umami richness: Despite its simplicity, Japanese Onion Soup is packed with ‘umami’ – the ‘fifth taste’ for which Japanese cuisine is renowned. Ingredients like kombu (seaweed) and shiitake mushrooms contribute to this savory flavor.
  • Health benefits: Onions are a source of quercetin, a powerful antioxidant that promotes heart health and controls blood sugar. This soup, Combined with the hydrating broth, is a healthy choice.
  • Versatility: Japanese Onion Soup is often served as a starter but can also be a palate cleanser between meals. Its lightness and simplicity make it versatile in the Japanese culinary landscape.

What Makes Japanese Onion Soup Special?

Japanese Onion Soup shines with its simplicity and subtlety, where the true essence of each ingredient is allowed to come forward.

The soup is delicate yet packed with ‘umami,’ a savory taste that’s a fundamental component of Japanese cuisine. 

This flavor profile, achieved through a careful balance of sweet onions, spicy broth, and often mushrooms or seaweed, sets it apart from its more robust Western counterparts.

Moreover, the soup embodies the Japanese philosophy of ‘Ichiju Sansai,’ advocating for a balanced, nutritional meal and reflecting the nation’s focus on health and longevity. 

Additionally, despite its traditional roots, Japanese Onion Soup has managed to carve a niche in contemporary global cuisine, especially in Westernized Japanese or Hibachi restaurants.

Its versatility, health benefits, and warm comfort make it a special and cherished component of Japanese culinary art.

japanese onion soup recipes

Ingredients 

IngredientQuantity
Carrot, chopped1/2 
Onion, chopped1 small 
Grated fresh ginger root1 teaspoon
Minced fresh garlic1/4 teaspoon
Minced fresh chives1 tablespoon
Baby portobello mushrooms, sliced1 cup
Celery, chopped1/2 stalk
Chopped fresh shiitake mushrooms1 cup
Beef bouillon granules3 teaspoons
Chicken stock2 tablespoons
Water2 quarts

Ingredient Tips 

  • Onion Selection: Opt for sweet or yellow onions as they caramelize well and give the soup its signature sweetness. They also hold up better in the soup and don’t disintegrate easily.
  • Broth Choice: A high-quality broth can significantly impact your soup. Homemade chicken or vegetable stock is ideal, but store-bought ones can work well too. Please make sure they are low-sodium to control the saltiness.
  • Dashi: Consider using dashi, a traditional Japanese soup stock, for an authentic taste. It’s made from kombu (dried kelp) and bonito flakes, providing a distinct umami flavor.
  • Mushrooms: Shiitake mushrooms add depth to the soup. You can use fresh or dried ones, but remember, dried mushrooms must be rehydrated before use.
  • Fresh Scallions: Don’t skimp on fresh or green onions for garnishing. They add vibrant color contrast and a new, crisp taste that complements the savory soup.

Can You Vary The Recipe With Other Ingredients?

  • Protein: Tofu cubes or thinly sliced chicken can add a protein boost. For a seafood twist, try adding prawns or clams.
  • Other Vegetables: Feel free to include other veggies for added nutrition and flavor. Carrots, bok choy, or thinly sliced bell peppers can work well. You could add corn for a bit of sweetness.
  • Mushrooms: Swap out the traditional shiitake mushrooms for other varieties like cremini, portobello, or oyster mushrooms. Each type lends a unique flavor.
  • Spices: Add a slice or two of fresh jalapeno or a dash of chili oil for a hint of heat.
  • Vegan/Vegetarian: Use vegetable broth instead of chicken, and opt for a kombu and shiitake-based dashi for a fully vegan version.
  • Garnish: Besides green onions, consider garnishing with fresh herbs like cilantro or parsley. Sesame seeds or thinly sliced nori (seaweed) can add a different texture and flavor.
Japanese Onion Soup’s  Recipe Other Ingredient

Recipe Directions

  • In a large pot, heat some oil over medium heat. Add the chopped celery, onion, and carrot. Sauté them for a few minutes until they begin to soften.
  • Add the grated ginger and minced garlic to the pot. Sauté for another minute to release their flavors.
  • Pour in the chicken stock and add the beef bouillon granules. Stir well to dissolve the granules and incorporate the flavors.
  • Add the chopped shiitake mushrooms and continue cooking for a few minutes until they soften.
  • Pour in the water and bring the soup to a boil. Once boiling, reduce the heat to low and let it simmer for 15-20 minutes to allow the flavors to meld together.
Exploring The Japanese Onion Soup’s

Variations, Add-Ons, And Toppings

Variations

  • Add other vegetables, like thinly sliced carrots or baby bok choy, for a more substantial soup. 
  • You can also experiment with different types of mushrooms beyond shiitake, such as cremini or maitake. 
  • Include tofu, prawns, or thinly sliced chicken for a protein-packed version.

Add-Ons

  • To add a unique twist, consider infusing the soup with flavors like ginger or lemongrass. 
  • A splash of sake or mirin can also enhance the soup’s complexity. 
  • A few slices of fresh jalapeno or a hint of chili oil can elevate the soup for those desiring a bit of heat.

Toppings

  • While scallions are a classic topping, garnish the soup with fresh herbs like cilantro or parsley. 
  • Seaweed strips, sesame seeds, or fried garlic chips could offer a crunchy contrast. 
  • A dollop of miso paste or a drizzle of sesame oil just before serving can also enhance the soup’s flavor profile.

Scaling The Recipe

To make Japanese Onion Soup, start by sautéing chopped celery, onion, and carrot in a pot until they become tender. Add grated ginger and minced garlic for additional flavor.

Stir in chicken stock and beef bouillon granules to enhance the soup base. Next, add chopped shiitake mushrooms and simmer the mixture to allow the flavors to meld. 

Pour in water and bring the soup to a boil before reducing the heat and letting it simmer. Finally, add sliced baby portobello mushrooms and season the soup with salt and pepper.

Finish by stirring in minced fresh chives. Serve the hot soup garnished with additional chives for an aromatic and comforting Japanese Onion Soup experience.

What Is Used For Garnishing?

  • Mushrooms: Thinly sliced mushrooms, such as shiitake or cremini, can be lightly sautéed and used as a garnish.
  • Herbs: Fresh herbs like cilantro or parsley can add color and freshness.
  • Seaweed: Thin strips of nori (seaweed) can add a slight marine flavor and an interesting texture.
  • Sesame Seeds: A sprinkle of toasted sesame seeds can lend a subtle nuttiness and a beautiful visual element.
  • Tofu: Small cubes of silken tofu can be used as a garnish, adding a soft textural contrast.
 Japanese Onion Soup Recipe

Can I Make The Soup In A Slow Cooker Or Instant Pot?

Slow Cooker

  • Sauté the onions and mushrooms in a pan until lightly browned to bring out their flavors, then transfer them to the slow cooker.
  • Add the broth and other ingredients, such as dashi or soy sauce, into the slow cooker.
  • Set the slow cooker to low and let it simmer for 4-6 hours. This slow, gentle cooking will help to develop a deep flavor in the soup.
  • Strain the soup before serving, garnish with scallions, and serve hot.

Instant Pot

  • Use the sauté function to brown the onions and mushrooms.
  • Add the broth and other ingredients to the Instant Pot, and secure the lid.
  • Set the Instant Pot to pressure cook on high for about 15-20 minutes, sufficient time to develop the flavors.
  • Once done, allow the pressure to release naturally before opening the lid.
  • Strain the soup, garnish with scallions, and serve hot.

Can I Use Store-Bought Broth, Or Should I Make My Own?

  • Store-Bought Broth: This is a convenient and time-saving option, ideal for whipping up a quick Japanese Onion Soup. However, choosing a high-quality, low-sodium broth is important to avoid an overly salty soup.
    Also, check the ingredient list for any unwanted additives or preservatives.
  • Homemade Broth: Making your broth allows you to control the ingredients and the sodium level. You can also customize the flavors to your liking. Chicken, beef, or vegetable broths can all work well, each lending a distinct taste to your soup.
    Making your broth does take more time and effort, but many find the enhanced flavor worth it.

Can I Use Different Types Of Meat/Fish/Pasta/Vegetables?

  • Meat: Thin slices of chicken or beef could be added for protein. Just ensure they are cooked thoroughly before adding to the soup.
  • Fish: White fish or shellfish like prawns or clams could be an interesting addition. be careful not to overpower the delicate flavor of the soup. Ensure the fish or shellfish is cooked separately and added at the end to prevent overcooking.
  • Pasta: Adding noodles could transform the soup into a more filling dish. Udon, soba, or even ramen noodles could work. Cook the noodles separately to prevent them from becoming too soft and absorbing too much broth.
  • Vegetables: There’s plenty of room for different vegetables in this soup. Thinly sliced carrots, bell peppers, or leafy greens like spinach or bok choy could be included. Consider adding edamame beans or corn for a touch of sweetness.
The Japanese Onion Soup’s Different Vegetables

Success Tips – Tips And Tricks For The Recipe 

Success Tips

  • Use fresh ingredients, especially the mushrooms, for enhanced flavor.
  • Adjust the seasonings to your taste preference.
  • Simmer the soup for sufficient time to allow the flavors to develop.
  • Garnish with fresh chives just before serving for a vibrant finish.
  • Serve the soup hot for the best taste and aroma. Enjoy!

Prepping Tips

  • Use A sharp knife: This will ensure your onions and mushrooms are thinly sliced, which is key to their texture in the soup.
  • Soak Dried ingredients: If using dried shiitake mushrooms or dried kombu for dashi, remember to soak them in water beforehand to rehydrate them.
  • Prepare In advance: The broth, whether homemade or store-bought, can be prepared and stored in the refrigerator for up to a week or in the freezer for up to 3 months.

Cooking Time Tips

  • Low And slow: Cooking the soup on low heat helps the flavors meld together. Don’t rush it – let it simmer for a while.
  • Taste As You go: Seasoning should be done gradually. Start with less salt or soy sauce, and adjust as the soup cooks.
  • Final Check: Before serving, taste the soup one last time to see if it needs further seasoning.
  • Be Cautious With Add-Ons: Ensure that proteins like chicken or tofu are cooked thoroughly. Add these closer to the end of the cooking time to prevent overcooking.
 Japanese Onion Soup

Nutritional Values 

Providing exact nutritional values for a recipe can be challenging without specific quantities and brands of ingredients used. However, Japanese Onion Soup is generally low in calories and fat.

It is a good source of vitamins and minerals, including vitamin C, potassium, and fiber. For more accurate nutritional information, it is recommended to use a recipe analyzer tool or consult a nutritionist.

What Are The Total Calories In The Recipe?

A basic Japanese Onion Soup made with onions, mushrooms, a light broth (like vegetable or chicken), and a dashi base is considered low in calories. A typical serving (approximately one cup) might contain between 40 to 60 calories. 

The calorie count will increase accordingly if you add additional ingredients such as tofu, meat, or other vegetables.

Dietary Restrictions Of The Recipe 

  • Gluten-Free: Traditional Japanese Onion Soup is typically gluten-free, as the main ingredients are onions, broth, and mushrooms. However, if soy sauce is used, ensure it’s a gluten-free version, as standard soy sauce contains wheat.
  • Vegetarian/Vegan: The soup is vegetarian if a vegetable broth is used. If dashi is used, make sure it’s made from seaweed (kombu) only, as traditional dashi contains bonito flakes derived from fish. If the soup is garnished with tofu, ensure it’s a type that doesn’t have any non-vegan coagulants.
  • Dairy-Free: Japanese Onion Soup is naturally dairy-free, containing no milk-based products.
  • Nut-Free: The classic recipe doesn’t contain nuts, making it suitable for individuals with nut allergies.
  • Low Carb/Keto: Japanese Onion Soup is low in carbs, making it suitable for a low-carb or keto diet. However, watch out for any add-ons, as certain ingredients like noodles or certain types of vegetables can increase the carb count.

 Health Benefits Of The Recipe 

  • Low Calorie: A typical serving of Japanese Onion Soup is low in calories but quite filling, making it a good option for weight management.
  • High In Antioxidants: Onions and mushrooms are rich in antioxidants, which can help protect your body from free radicals and inflammation.
  • Good For Digestion: The broth-based nature of the soup can be soothing for the digestive system. Additionally, onions are high in fiber, which aids in digestion and promotes gut health.
  • Hydrating: The high water content in this soup can contribute to your daily fluid intake, promoting hydration.
  • Boosts Immunity: Making the soup with a bone broth can provide collagen and amino acids that are beneficial for joint health and immunity.

Nutrition Table 

Nutrition Table

How Can I Make Soup Lower In Sodium?

  • Broth: Opt for low-sodium or unsalted versions of broth. If you’re making your broth, you can control the salt added.
  • Soy Sauce: Soy sauce is typically high in sodium. You can either reduce the amount used or choose a low-sodium variety. You could also consider alternatives like coconut aminos, which have a similar flavor but less sodium.
  • Dashi: If you’re using a pre-packaged dashi mix, these can sometimes be high in sodium. Making your dashi at home allows you to control the sodium level.
  • Seasoning: Instead of relying on salt for flavor, try using other seasonings like herbs, spices, or a squeeze of citrus like lemon or lime juice to enhance the flavor without adding sodium.
  • Taste As You go: Gradually add salt or high-sodium ingredients and taste the soup. This can prevent accidentally adding too much sodium.

How Can I Make Soup Lower In Sugar?

  • Broth: Some store-bought broths can contain added sugars. Always check the label and opt for a sugar-free version or make your own at home, where you can control the ingredients.
  • Soy Sauce: While not high in sugar, some brands of soy sauce do contain a small amount. Double-check the nutritional information to ensure it fits your dietary needs.
  • Vegetables: Different vegetables contain different levels of natural sugars. Onions contain some natural sugars, but the amount is usually insignificant, especially when spread across several servings of soup.
  • Additions And Garnishes: Be mindful of any additional ingredients or garnishes added to the soup. For example, if you add mirin (a sweet rice wine) for flavor, know that it does contain sugar. Similarly, if you’re garnishing with something like teriyaki tofu, it might have added sugars.
Japanese Onion Soup Recipe

How To Serve The Soup At Its Best?

  • Serve Hot: Soup is best served hot. As soon as it’s ready, ladle it into bowls and serve. The flavors are more pronounced when it’s hot, and the warmth contributes to the comforting nature of the dish.
  • Proper Dishware: Use deep bowls to serve the soup. Traditionally, Japanese Onion Soup is served in small, lidded bowls, but any deep soup bowl will work. Using Asian soup spoons can add an authentic touch and enhance the eating experience.
  • Garnish: A sprinkle of fresh chives on top just before serving adds to the flavor and gives the soup a pop of color. You can also consider other garnishes like thinly sliced green onions, a sprinkle of sesame seeds, or a touch of seaweed for added visual appeal and taste.
  • Accompaniments: The soup can be served as a starter before the main course or as part of a larger Japanese-inspired meal. Pair it with sushi, a simple salad, or a rice dish for a complete dinner.
  • Freshness: The fresh ingredients like mushrooms and chives should have a vibrant color and texture. This ensures the soup looks its best and has the newest flavor.

Perfect Side Dishes To Complement The Recipe

  • Sushi Or Sashimi: Given the soup’s delicate nature, it pairs wonderfully with sushi or sashimi. These provide a nice contrast in flavors and textures.
  • Japanese Salads: A simple cucumber salad with a soy-sesame dressing or a surimono (vinegar-based salad) would be a refreshing contrast to the warm soup.
  • Yakitori Skewers: These grilled chicken skewers would add a smoky, savory element to your meal that complements the light, umami flavor of the soup.
  • Gyoza Or Dumplings: Japanese-style dumplings, either pan-fried or steamed, are fantastic. You can choose from a variety of fillings to suit your preference.
  • Steamed Rice Or Onigiri: A bowl of steamed jasmine rice or onigiri (rice balls) would work well with the soup, adding a filling and comforting element to the meal.
Japanese Onion Soup Recipe

How Long Can We Store The Soup?

Japanese Onion Soup can be safely stored in the refrigerator for 3-4 days. Be sure to let the soup cool completely before transferring it to an airtight container for storage.

When ready to eat, reheat the soup over medium heat until hot.

If you need to store it for a longer period, this soup also freezes well. The soup can be frozen in an airtight, freezer-safe container for up to 3 months.

To reheat, defrost the soup in the refrigerator overnight and then warm up on the stove.

Can I Make Soup In Advance?

Yes, you can certainly prepare Japanese Onion Soup in advance. It’s a good dish to make ahead because the flavors meld and deepen over time, creating an even more flavorful soup the next day.

To do this, follow the recipe as normal, let the soup cool, and then store it in an airtight container in the refrigerator. When you’re ready to serve it, reheat the soup on the stovetop over medium heat until it’s hot.

You can also reheat individual servings in the microwave if you prefer.

What Can We Do With Leftovers?

  • Rice Enhancer: Use the soup as a flavorful broth to cook rice or other grains. It’ll infuse them with a delicious umami flavor.
  • Noodle Soup: Add some cooked ramen or soba noodles to the leftover soup for a quick noodle soup dish. You can also add excess protein or vegetables for a more substantial meal.
  • Stir-Fry Sauce: Reduce the soup on the stove until it’s more concentrated, and use it as a sauce in a stir-fry.
  • The Base For Other Soups: Use the leftover soup as a base for other soups. Add different vegetables, proteins, or grains to transform it into a whole new dish.
  • Braising Liquid: Use the soup as a braising liquid for meats or vegetables. It will impart a wonderful flavor to the ingredients.
japanese onion soup recipes

Special Tools And Equipment

  • Large Pot: A sturdy pool is ideal for simmering the soup and accommodating all the ingredients.
  • Cutting Board And Knife: A cutting board and a sharp knife are essential to chop the vegetables and mushrooms.
  • Grater: Use a grater to grate fresh ginger root for optimal flavor.
  • Stirring Spoon Or Ladle: A long-handled spoon or ladle will help mix and serve the soup.
  • Measuring Spoons: Accurately measuring the spices, bouillon granules, and liquids is easier with measuring spoons.
  • Soup Bowls And Garnish Tools: For serving the soup, you can use bowls and have optional tools like fresh chives for garnishing.

Frequently Asked Questions

Can I Use Dried Shiitake Mushrooms Instead Of Fresh Ones?

Yes, you can use dried shiitake mushrooms in the recipe. Soak them in warm water for about 20 minutes until they become soft, then chop and add them to the soup.

Is There A Vegetarian/Vegan Alternative To Chicken Stock?

Absolutely! You can use vegetable or mushroom broth as a substitute for chicken stock to keep the recipe vegetarian or vegan-friendly.

Can I Make The Soup In Advance?

Yes, you can make the Japanese Onion Soup in advance. Allow it to cool completely before transferring it to an airtight container and refrigerating. Reheat gently on the stovetop or in the microwave when ready to serve.

Can I Freeze The Leftover Soup?

While it is possible to freeze the soup, the texture of the vegetables may change slightly upon thawing. Consuming the soup within a few days is recommended, or storing it in the refrigerator rather than freezing for best results.

What Other Herbs Or Spices Can I Add To Enhance The Flavor?

You can experiment with other herbs and spices, like a pinch of dried chili flakes, a dash of soy sauce, or a squeeze of lemon juice to add a kick of heat or acidity to the soup. Adjust the quantities according to your taste preferences.

Delicious Japanese Onion Soup Recipes - A Soul-Soothing Elegance

Delicious Japanese Onion Soup Recipes – A Soul-Soothing Elegance

5 from 10 votes
Recipe by Hanna Barnes Course: Soups u0026amp; Broths
Servings

4

servings
Prep time

15

minutes
Cooking time

45

minutes
Calories

60

kcal

Japanese Onion Soup is a comforting and flavorful dish that combines the earthy sweetness of onions with aromatic vegetables and mushrooms. The soup is simmered in a savory broth infused with ginger and garlic, creating a warm and soothing bowl of goodness perfect for any time of the year.

Ingredients

  • 1/2 1/2 Carrot, chopped

  • 1 small 1 Onion, chopped

  • 1 teaspoon 1 Grated fresh ginger root

  • 1/4 teaspoon 1/4 Minced fresh garlic

  • 1 tablespoon 1 Minced fresh chives

  • 1 cup 1 Baby portobello mushrooms, sliced

  • 1/2 stalk 1/2 Celery, chopped

  • 1 cup 1 Chopped fresh shiitake mushrooms

  • 3 teaspoons 3 Beef bouillon granules

  • 2 teaspoons 2 Chicken stock

  • 2 quarts 2 Water

Step-By-Step Directions

  • Preparation Steps
    Cleanly chop the vegetables with ginger, and garlic.
    Slice mushrooms, reserving the rest for later.
  • Cooking
    Combine the chopped veggies in a large saucepan or stockpot.
    Add chicken stock, beef bouillon, and water.
    Place the pot over high heat, and bring to a rolling boil.
    Once boiling, cover the pot, reduce the heat to medium, and let it cook for 45 minutes.
  • Blending (optional)
    If you prefer a smoother soup, you can use a blender or immersion blender at this point to blend the soup. However, this step is optional, and the soup can be left as it is for a more rustic feel.
  • Final Touches
    While the soup is cooking, slice the remaining mushrooms and place them into a separate pot.
    After 45 minutes of cooking, place a strainer over the pot with the raw mushrooms.
    Carefully strain the cooked soup into the pot with the mushrooms, discarding the strained materials.
  • Serving
    Ladle the soup with mushrooms into small porcelain bowls.
    Sprinkle freshly chopped chives over the top for a colorful and tasty garnish.
    Serve hot, using Asian soup spoons for an elegant touch.

Notes

  • Customization: Feel free to customize the recipe by adding other vegetables like sliced mushrooms, snow peas, or spinach for added texture and nutrition.
  • Broth options: While the recipe calls for vegetable broth, you can use other types of broth, such as chicken or mushroom broth, for variations in flavor.
  • Soy sauce alternatives: If you prefer a milder flavor, substitute the soy sauce with tamari or low-sodium soy sauce.
  • Garnish ideas: Apart from minced fresh chives, you can garnish the soup with toasted sesame seeds, sliced green onions, or a drizzle of sesame oil for extra depth of flavor.
  • Storage and reheating: Leftover soup can be stored in an airtight container in the refrigerator for up to 3-4 days. Reheat gently on the stovetop or microwave, adding a splash of water or broth if needed.
  • Serving suggestion: Enjoy the Japanese Onion Soup as a light and comforting appetizer, or pair it with steamed rice or a salad for a more substantial meal.

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