A warm rice bowl of miso-glazed roasted kabocha squash, sesame greens, and a soft egg for an easy Japanese dinner.
Donburi, meaning simply bowl, is one of the most practical formats in Japanese home cooking: a mound of rice topped with a simmered or roasted component and a savory glaze, built for weeknights when there isn't time for multiple side dishes. Kabocha squash, with its dense, naturally sweet flesh, is a common autumn and winter donburi topping, often simmered in dashi, soy, and sugar (a preparation called kabocha no nimono). This version roasts the squash instead of simmering it, which concentrates its sweetness and gives it caramelized edges, then finishes it with a quick miso glaze that clings to the flesh rather than pooling underneath. Roasting also means you can prep rice and greens while the squash is in the oven, making the whole bowl come together with minimal active cooking. The finished bowl balances the squash's sweetness against salty miso glaze, the mild bitterness of quickly wilted greens, and a runny egg yolk that turns into a sauce of its own once broken over the hot rice.
Serves 4
Heat oven to 425°F (220°C). Toss kabocha wedges with 2 tbsp oil, spread on a parchment-lined sheet, and roast 25-30 minutes, flipping once, until the edges are browned and a knife slides in easily.
Whisk miso, mirin, soy sauce, honey, garlic, and remaining oil together in a small bowl until smooth.
In the final 5 minutes of roasting, brush the miso glaze generously over the squash and return to the oven until sticky and lightly caramelized at the edges.
Add the glaze late, not at the start — miso and honey burn quickly at high heat if they go in too early.
Heat sesame oil in a skillet over medium-high heat. Add spinach or bok choy and toss just until wilted, 1-2 minutes. Season lightly with a pinch of salt.
Divide rice among four bowls. Top with glazed squash wedges and wilted greens, then place a soft-boiled egg on top of each. Sprinkle with sesame seeds and scallions and serve immediately.
Leave the skin on the kabocha — it becomes tender when roasted and holds the wedges together.
Cut wedges to an even thickness so they roast at the same rate; uneven pieces will leave some mushy and others underdone.
For a true onsen-style egg, cook whole eggs in 145°F (63°C) water for 45 minutes for a custardy, barely-set texture.
Swap kabocha for roasted sweet potato or butternut squash if kabocha isn't available.
Add a few slices of grilled or pan-seared chicken thigh for a heartier bowl.
Use the same miso glaze on roasted eggplant halves for a smokier, umami-forward variation.
Store roasted squash and rice separately in the fridge for up to 3 days. Reheat squash in a 375°F oven or skillet to restore some caramelization; microwaving works but softens the edges.
Kabocha simmered in a sweet soy glaze (kabocha no nimono) is a staple of Japanese home cooking, especially around the winter solstice (toji), when eating kabocha is a folk tradition believed to ward off illness through the cold months. Donburi-style rice bowls became widespread in the Edo period as a fast, one-bowl meal for busy urban workers.
No — kabocha skin is thin and edible once roasted tender, unlike butternut squash skin, so you can leave it on for texture and easier prep.
Roast the squash and cook the rice up to 3 days ahead, then wilt fresh greens and cook eggs to order when you're ready to eat, since both are quick and best fresh.
Butternut or acorn squash are the closest substitutes, though you'll want to peel them since their skins don't soften the same way in the oven.
Per serving (400g / 14.1 oz) · 4 servings total
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