Miso-Marinated Spanish Mackerel (鰆の西京焼き, Sawara no Saikyōyaki)

Sawara is a spring fish in western Japan, so plainly seasonal that its kanji writes fish and spring together. When it's at its prime, the flesh is pale, moist, and fine-grained, with enough oil to take a miso marinade without disappearing under it. Sourcing first, always. A tired fillet won't be rescued by miso, only sweetly disguised, and that's not the way we do it here.

Saikyōyaki looks like a special-occasion dish because the surface comes out lacquered and the fish flakes in clean, pearly sheets. The work itself is almost bashful. Salt the fish lightly, blot it, bury it in sweet white miso for two days, then scrape that miso off before it goes near the grill. That last part decides the dish. Leave the miso on and the sugar burns before the fish cooks, and then everyone blames the grill, poor innocent thing.

The marinade is Saikyō miso, the pale, sweet white miso of Kyoto, loosened with sake and mirin. It seasons slowly, firms the flesh, and lends a round sweetness without making a sauce of the fish. This is honmono made reachable: good fish, patient miso, careful heat. Nothing hidden. Serve it with rice, a small vinegared dish, and something green or bitter from the season, and leave the plate room to breathe.