Nokdu-muk

Nokdu-muk is a Korean muk, or jelly, made from mung bean starch. In its most commonly encountered form, it is also called cheongpo-muk (청포묵, 淸泡-), which literally means "clear froth jelly," owing to its clear white color. If it is colored with gardenia, the nokdu-muk is called hwangpo-muk, which literally means "yellow froth jelly." Nokdu-muk is usually served cold, usually as the banchan (side dish) nokdu-muk-muchim (녹두묵무침). As it has little flavor of its own, nokdu-muk is typically seasoned with soy sauce and vinegar.

Source: Wikipedia