Hōrensō no Ohitashi

ほうれん草のお浸し, the Japanese blanched spinach in dashi: young spinach blanched for seconds, shocked to arrest colour, squeezed dry, and soaked briefly in a cold dashi-soy broth of exact simplicity, served in cool, precisely cut batons, one of the most refined vegetable preparations in any cuisine

Origin: Edo Period Japan — Osaka and the Tokaido Coast

From the journey of Spinach.

Ohitashi (お浸し) is a preparation technique rather than a dish name: it denotes any vegetable blanched, shocked cold, squeezed dry, and then soaked or dressed in a cold or cool seasoning broth. Applied to spinach (ほうれん草, hōrensō), the result (hōrensō no ohitashi) is one of the most widely eaten and most instantly recognisable dishes in the Japanese vegetable repertoire, served as a side dish (okazu) at meals from the most modest household table to the most formal kaiseki sequence. The technique is a model of the Japanese culinary philosophy that prizes the essential character of a single ingredient expressed with minimum intervention. The spinach is cooked for between thirty and sixty seconds; any longer and the vivid green begins to dull and the texture to soften beyond the desired resistance. The cold water bath stops the cooking at precisely the correct point; the squeezing removes the water that would dilute the dressing; and the soaking in dashi allows the broth's umami to penetrate the leaf gently, so that the dashi and the spinach become integrated rather than one merely wet with the other. The dashi used in ohitashi is the most fundamental element: a standard ichiban dashi (first-draw dashi) of kombu and katsuobushi (dried fermented tuna flakes) gives the broth a clean, oceanic umami that complements spinach in a way that no other stock quite matches. The dish is one of the clearest arguments for keeping good dashi in a Japanese household at all times: with ready dashi, hōrensō no ohitashi requires fewer than fifteen minutes and produces something that is quietly one of the most perfect preparations of a leaf vegetable that exists.

Ingredients

Spinach

  • 500 g young flat-leaf spinach (or baby spinach), washed

Broth

  • 200 ml dashi (ichiban dashi: kombu and katsuobushi)
  • 2 tbsp light soy sauce (usukuchi shoyu preferred, or regular soy)
  • 1 tbsp mirin

To Finish

  • 1 tbsp toasted sesame seeds, to garnish
  • 3 g katsuobushi (fine dried bonito flakes), to garnish

Method

  1. Prepare the dashi broth: combine the dashi, soy sauce, and mirin in a small saucepan. Bring to a bare simmer, stirring to combine. Remove from the heat immediately and allow to cool to room temperature, then refrigerate until cold.
  2. Bring a large pot of well-salted water to a rolling boil. Prepare a large bowl of iced water. Add the spinach all at once to the boiling water. Blanch for exactly 30–45 seconds, the leaves should be wilted and brilliant green.
  3. Transfer the spinach immediately to the iced water and leave for 2 minutes until completely cold. Drain. Gather the spinach into a tight bunch and squeeze it very firmly in your hands to extract as much water as possible. The spinach should emerge as a firm cylinder.
  4. Place the squeezed spinach in a shallow dish. Pour the cold dashi broth over it. Leave to soak for 10–15 minutes, turning the spinach once halfway through, so the broth can penetrate the leaf.
  5. Lift the spinach from the broth, squeeze gently once more (the spinach should retain some moisture but not be dripping), and cut the cylinder into neat batons of 4–5 cm. Arrange the batons vertically in small individual serving dishes or in a single shallow bowl, cut side visible.
  6. Spoon a small amount of the remaining dashi broth around and over the spinach batons. Scatter with sesame seeds and katsuobushi. Serve immediately as a cold starter or side dish.

Notes

Usukuchi shoyu (light soy sauce) is preferred here over regular dark soy: it is saltier but lighter in colour, allowing the vivid green of the spinach to remain dominant visually and allowing the dashi's delicate umami to remain the principal flavour. For a vegan version, use a kombu-only dashi (konbu dashi) and omit the katsuobushi garnish; the result is slightly less complex but still excellent. The goma-ae variant (胡麻和え) is made with the same blanched, squeezed spinach, dressed instead in a paste of ground toasted sesame, sugar, and soy, which is the richest and most popular ohitashi variant. The ohitashi broth left after soaking can be used again immediately for a second batch of spinach, or it can be strained and used as a light seasoning broth for other vegetables.

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