Onbap is a Korean restaurant in Daechi-dong, Gangnam-gu, Seoul, that serves grilled saury and mackerel. The fish is large and grilled moist, and the side dishes are served well. The grilled mackerel is crisp outside and juicy inside, and it goes well with rice. Many customers order grilled fish for lunch, and refills of side dishes are hard to get right away during busy hours.