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1
Prepare each vegetable individually before any cooking begins. Carve the satoimo to a six-sided hexagonal form. Cut carrots into flower rounds (ninjin no hanagata). Tie shirataki into individual knots. Roll and secure the konbu. Trim and string the snow peas. Cut the fu into its seasonal decorative shape. These carved forms are not ornament: they are a seasonal visual language integral to the dish.
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2
Prepare two separate simmering broths. For delicate components (satoimo, fu, snow peas): combine dashi, soy sauce, and mirin in an 8:1:1 ratio. For firm components (lotus root, carrot, konbu, shirataki): combine dashi, soy sauce, and mirin in a 5:1:1 ratio. The broth must be cold when the vegetables are added; starting in hot liquid reduces flavour penetration.
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3
Place the firm vegetables — lotus root, carrot, konbu roll, and shirataki knots — each in their own vessel or in clearly separated batches with the 5:1:1 cold broth. Set an otoshibuta (drop lid) directly on the surface of the liquid over each batch. Bring to a bare simmer — the surface should tremble, not boil. Cook each component until just tender at its centre, probing with a fine skewer; resistance should yield without the vegetable collapsing. Remove from heat immediately.
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4
This is the step on which the dish lives or dies. Once each firm vegetable is removed from heat, leave it submerged in its simmering liquid and allow it to rest, covered, for a minimum of 30 minutes. As the liquid cools it continues to penetrate, and the majority of flavour absorption occurs during this resting period — not during cooking. Do not rush, decant, or reheat; the quiet pull-off in the cooling broth is the essential mechanism of nishime.
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5
Separately, place satoimo and fu in the cold 8:1:1 broth with the drop lid in place. Bring to a bare simmer and cook until the satoimo is creamy at the centre — a skewer meets no resistance. Remove from heat and rest in the cooling liquid for a minimum of 30 minutes by the same pull-off method.
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6
Cook the snow peas last and briefly, in a small measure of the 8:1:1 broth brought to a gentle simmer. Add the peas and cook only until their colour intensifies to a vivid green and they remain firm to the bite — 60 to 90 seconds at most. Remove immediately; green vegetables are never overcooked in nishime. Their colour is the test.
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7
To plate, arrange each component separately and distinctly on the serving vessel so that the carved shapes, colours, and textures remain legible as individual elements. Each item should retain its own integrity of colour, texture, and flavour. The plate is read visually before it is tasted. Reserve all remaining nimono broth as a seasoning base for subsequent preparations; it is concentrated and deeply flavoured.