Refreshing Iced Somen Noodles
Red Onion and Tsuyu Sauce

By DishFrames
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A cooling Japanese-inspired noodle dish featuring springy somen noodles, crunchy red onion shreds, and a savory, tangy multi-spice tsuyu sauce finished with a rich egg yolk.

↓ The ingredients ↓ The steps

Iced somen noodles are a staple Japanese summer comfort food designed to beat the heat through texture and refreshing flavors. This creative variation enhances the classic dish with crisp raw red onions, a savory-tangy sauce blending chicken bouillon, sesame oil, and aged vinegar, and a velvety raw egg yolk that ties everything together when mixed.

A bowl of chilled somen noodles topped with purple onion shreds, green onions, sesame seeds, bonito flakes, and a raw egg yolk
A bowl of chilled somen noodles topped with purple onion shreds, green onions, sesame seeds, bonito flakes, and a raw egg yolk
Prep10 mins
Cook5 mins
Total15 mins
Yield1 serving
DifficultyEasy
Calories420 kcal

Ingredients

Instructions

  1. 1Shred the red onion
    A close-up view of a red onion being shredded with a slicer into a glass bowl of water.

    Take a red onion and use a yellow handheld slicer to slice it into fine shreds directly over a glass bowl filled with water.

    Tip: Slicing the onion directly over water helps catch all the pieces cleanly.
  2. 2Soak the onion shreds
    A hand gently washing purple onion shreds inside a bowl filled with ice water.

    Submerge and wash the shredded red onions in a bowl of ice water, letting them soak for a little while to mellow out the spicy flavor and make them extra crunchy.

    Tip: Make sure the water is ice cold to maximize the crunchiness of the onion shreds.
  3. 3Prepare the sauce
    A spoon scooping and measuring seasonings into a decorative blue and white ceramic bowl.

    Add half a tablespoon of chicken bouillon powder, half a tablespoon of sugar, 2 tablespoons of Japanese tsuyu, half a tablespoon of sesame oil, 1 tablespoon of Chinese aged vinegar, and 1 tablespoon of soy sauce into a ceramic bowl using a spoon, then mix well.

    Tip: Mix the dry seasonings well with the liquids to ensure the sugar and bouillon dissolve evenly.
  4. 4Boil the somen noodles
    Dry somen noodles cooking and boiling inside a large stainless steel pot.

    Drop dry somen noodles into a pot of boiling water and cook them until done.

    Tip: Keep an eye on the noodles as somen cooks very quickly in boiling water.
  5. 5Ice bath the noodles
    Chopsticks stirring cooked noodles in an ice-water bath filled with ice cubes.

    Immediately plunge the cooked somen noodles into a glass bowl filled with ice water and ice cubes, stirring with chopsticks so the texture becomes exceptionally springy and chewy.

    Tip: The ice shock is essential for achieving the signature chewy texture of chilled somen.
  6. 6Assemble the dish
    A white serving bowl filled with chilled somen noodles as purple onion shreds are added on top.

    Place the chilled somen noodles into a clean white serving bowl, and top them with the prepared shredded purple onion.

    Tip: Drain excess water from the chilled noodles before placing them in the serving bowl.
  7. 7Sprinkle Green Onions
    Freshly chopped green onions scattered across noodles and red onion slices in a white bowl.

    Take the chopped green onions and sprinkle them evenly over the chilled somen noodles and shredded red onions in the bowl.

    Tip: Fresh green onions add a vibrant color and crisp bite.
  8. 8Pour the Prepared Sauce
    Dark savory sauce being poured onto the side of the somen noodles and onion toppings in a white bowl.

    Take the previously mixed dark sauce and pour it evenly over the somen noodles, red onions, and green onions.

    Tip: Pour around the edges so the sauce distributes evenly through the noodles.
  9. 9Add Sesame Seeds
    Sesame seeds being scattered over the seasoned noodles, onions, and sauce.

    Sprinkle sesame seeds generously over the dressed noodles and toppings to add a nutty flavor and texture.

    Tip: Toasted sesame seeds give the best aroma.
  10. 10Scatter Bonito Flakes
    Bonito flakes falling and scattering over the top of the prepared noodle dish.

    Scatter bonito flakes over the top of the noodles, allowing them to gently dance and add a savory umami depth.

    Tip: Add them right before serving so they retain their texture.
  11. 11Add Egg Yolk
    A bright raw egg yolk resting on a spoon being positioned in the center of the dressed somen noodles.

    Carefully place a raw egg yolk right in the center of the bowl using a spoon to complete the dish.

    Tip: Break the yolk and mix it into the noodles just before eating for a rich, creamy coating.

Burn It Off

Brisk Walking
~85 minutes of daily balanced walking (~5 km/h).
Leisurely Cycling
~65 minutes of casual cycling (~15 km/h).
Yoga
~2 hours of gentle stretching and mindfulness.

Frequently Asked Questions

Red onions provide a milder flavor and vibrant color that works best for raw applications, but sweet white onions or yellow onions can be used if soaked thoroughly in ice water to tame their bite.
Somen noodles are extremely thin and cook rapidly. Plunging them into ice water stops the cooking instantly and rinses away excess surface starch, giving them an elastic and chewy bite.
Yes, provided you use fresh, high-quality, or pasteurized eggs. The rich yolk creates a creamy emulsion with the tsuyu sauce when broken and mixed into the noodles.
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