Yuzu-Marinated Grilled Spanish Mackerel (鰆の幽庵焼き, Sawara no Yūanyaki)

Sawara is called a spring fish right in its character: 鰆, fish beside spring. That isn't poetry pretending to be cooking. When sawara is at its prime, the flesh is pale, moist, and gentle enough to take seasoning without being swallowed by it. This is why Yūanyaki suits it so well.

The dish looks like ceremony, but the work is simple. Mix soy sauce, mirin, and sake in equal parts, add sliced yuzu, and let the fish rest in that tare. The two days matter because sawara is thick and mild. A short dip perfumes only the surface, while a patient soak seasons the flesh evenly and firms it just enough for the grill. Too long, though, and the soy begins to make the fish stern. We are seasoning, not curing a museum specimen.

The one detail that decides it is the grill. Wipe the marinade from the fish before cooking, then brush it back on in thin coats near the end. If the wet tare goes on too early, the sugar in the mirin burns before the fish is cooked. If it goes on late and lightly, it becomes a citrus-scented sheen. Nothing hidden, nothing heavy. Rice, soup, one vegetable dish, and this fish are enough for a composed meal.