Kimchi.

Kimchi is a traditional Korean side dish (banchan) consisting of salted and fermented vegetables, most often napa cabbage or Korean radish. A wide selection of seasonings are used, including gochugaru, spring onions, garlic, ginger, and jeotgal. Kimchi is also used in a variety of soups and stews. Kimchi is a staple food in Korean cuisine and is eaten as a side dish with almost every Korean meal. (Wikipedia)