Grain-wise, cooked foxtail millet is used in the Gwanbuk region, while cooked rice is used in other regions.[2][3] Sometimes, millet, quinoa, or other grains may also be used.[4][5]
The Hamgyŏng Province is famous for its gajami-sikhae (fermented flounder).[2] Righteye flounders—preferably yellow-striped ones harvested during December to early March— are washed, drained, and salted with coarse sea salt for about ten days.[2] The salted fish are then rinsed, cut into bite-size pieces, mixed with cooked foxtail millet and chili powder, and let to age.[2] After four days, thickly julienned and salted radish slices mixed with chili powder are added, and the sikhae can be eaten after another ten days of aging.[2]