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Blanched Komatsuna in Dashi (小松菜のお浸し, Komatsuna no Ohitashi)

Blanched Komatsuna in Dashi (小松菜のお浸し, Komatsuna no Ohitashi)

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Komatsuna no ohitashi is the home cook's reliable green: a quick blanch, a careful press, and a short rest in dashi until the stems taste clean and seasoned through.

Salads
Japanese
Weeknight
Quick Meal
Make Ahead
10 min
Active Time
15 min cook25 min total
Yield4 servings

Komatsuna is a kind green. Spinach can turn iron-bitter if you look away for half a minute, but komatsuna gives you more room. Its stems stay juicy, its leaves hold their color, and in winter, when shun sweetens it, the whole bunch seems to know what it is doing.

Ohitashi looks like a dressed salad, but that's not quite right. The word comes from hitasu, to soak, and the soaking is the method. You blanch the greens, cool them, press out the water, then let clear dashi enter the spaces the water left behind. That is the first secret, and it is smaller than people make it: press gently, not brutally. If you wring the leaves dry, they drink poorly and look tired. If you leave them wet, the broth turns thin.

We serve a little dish like this beside rice, soup, and one stronger main dish, not because it is decoration, but because the meal needs a green, quiet note. Nothing hidden. Just a good vegetable, a stock that tastes of sea and smoke, and enough soy to make both speak plainly. Leave it room in the bowl, and it will look as calm as it tastes.

Komatsuna takes its name from Komatsugawa, an Edo-period farming area in what is now Edogawa, Tokyo, where the green became closely associated with the local table. A common local account says the eighth Tokugawa shogun, Yoshimune, praised the vegetable in the early eighteenth century and linked it to the Komatsugawa name. Ohitashi belongs to the broader washoku habit of treating vegetables by method rather than menu: blanching, cooling, and steeping them in seasoned dashi so the vegetable remains the subject.

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Ingredients

komatsuna

Quantity

1 bunch (about 300g)

washed well, stems and leaves kept attached

cold water

Quantity

4 cups

for dashi

konbu (dried kelp)

Quantity

1 piece (about 8g)

katsuobushi (bonito flakes)

Quantity

15g

for dashi

dashi

Quantity

1 1/4 cups

soy sauce

Quantity

1 1/2 tablespoons

mirin

Quantity

1 tablespoon

sea salt

Quantity

1/4 teaspoon, plus more for blanching

katsuobushi (optional)

Quantity

2 tablespoons

for serving

Equipment Needed

  • Wide pot
  • Fine-mesh strainer lined with a clean cloth
  • Shallow dish for soaking
  • Kitchen tongs or long cooking chopsticks

Instructions

  1. 1

    Make the dashi

    Wipe the konbu with a damp cloth, but don't wash it. Put it in 4 cups cold water and bring it up slowly over low heat. Pull the konbu when the water trembles and small bubbles climb the pot, before it boils. Add the katsuobushi, take the pot off the heat, and let the flakes sink for two minutes. Strain through a cloth or fine sieve and don't squeeze, because squeezing presses out the stronger oily taste that clouds a clean stock.

    You need only 1 1/4 cups for this dish. Save the rest for miso soup or a small clear soup.
  2. 2

    Season the soaking broth

    Combine 1 1/4 cups dashi, soy sauce, mirin, and 1/4 teaspoon salt in a small pan. Warm just until the mirin loses its raw edge, then cool to room temperature. The broth should taste slightly stronger than soup, because the greens will drink it and soften the seasoning.

  3. 3

    Blanch the stems

    Bring a wide pot of water to a full boil and salt it lightly. Hold the komatsuna by the leaves and lower only the stems into the water for 30 seconds. The stems are thicker than the leaves, and this head start keeps the bunch from ending with crunchy stems and tired leaves.

  4. 4

    Cook the leaves

    Lower the leaves into the same boiling water and cook 20 to 30 seconds more, just until the color turns bright and the stems bend without snapping. Komatsuna is forgiving, but don't boil the life from it. Ohitashi wants a clean green taste, not vegetable sighing in a bowl.

  5. 5

    Cool and press

    Lift the komatsuna into cold water at once, swishing gently to stop the cooking and set the color. Gather the stems together, align the bunch, and press from root end to leaf end with both hands. Don't wring it hard. You want excess water gone so the dashi can enter, but the leaves should still look glistening fresh.

  6. 6

    Cut and soak

    Trim off the root ends and cut the komatsuna into 2-inch lengths. Lay the pieces in a shallow dish, keeping stems and leaves roughly together, and pour the seasoned dashi over them. Soak at least 15 minutes, or refrigerate up to 1 day. The soaking is the dish: ohitashi means the greens are dipped and steeped, not dressed at the last moment.

  7. 7

    Plate quietly

    Lift the komatsuna from the broth and press lightly so it isn't dripping. Arrange in small bundles with a little height, spoon over a teaspoon or two of the dashi, and finish with katsuobushi if you like. Serve cool or at room temperature, beside rice and soup, where a green dish like this does its calm work.

Chef Tips

  • Choose komatsuna with crisp stems, lively green leaves, and no yellowing at the edges. Sourcing first, always. A tired bunch will not become honest because you gave it better dashi.
  • For a meatless table, make the stock with konbu and dried shiitake. Soak one 8g piece of konbu and two dried shiitake in 4 cups cold water overnight, then warm gently and strain. That is honmono in the temple-kitchen line, not a lesser thing.
  • Do not skip the cooling water after blanching. It stops the cooking at the point you chose, which is the only way the stems stay bright and the leaves stay clear-tasting.
  • Press along the length of the greens, from stems toward leaves. Twisting breaks the fibers and muddies the shape, and this dish has so little adornment that the shape matters.
  • Komatsuna no ohitashi is best after 15 minutes and still good the next day. After that the color dulls and the leaves give up their clean edge.

Advance Preparation

  • Make the dashi up to 2 days ahead and keep it refrigerated. Warm only the portion used for the soaking broth, then cool before adding the greens.
  • Blanch, press, cut, and soak the komatsuna up to 1 day ahead. Keep it covered in the seasoned dashi, then lift and plate just before serving.
  • If making the meatless konbu and dried shiitake dashi, start it the night before with a cold soak for a rounder, quieter stock.

Frequently Asked Questions

Nutrition Information

1 serving (about 160g)

Calories
25 calories
Total Fat
0 g
Saturated Fat
0 g
Trans Fat
0 g
Unsaturated Fat
0 g
Cholesterol
2 mg
Sodium
530 mg
Total Carbohydrates
4 g
Dietary Fiber
1 g
Sugars
2 g
Protein
2 g

Note: Chef personas and recipes are created with AI assistance. Cook with care: follow safe food-handling practices, check doneness with a thermometer when needed, and adapt for allergies and your kitchen.

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