At his sous vide demo in Aspen, chef David Chang talked about his affinity for cooking with gojuchang. Gojuchang (pronounced "go-joo-chong") is a Korean red pepper paste. Usually fermented, it contains dried chile peppers and an emulsifying sweetener such as molasses. The paste is used sparingly for marinating, cooking, and as a condiment for marinated beef, mixed vegetables over rice, noodles, and other dishes. It can be purchased at most Asian markets.
Have you ever tried gojuchang?
Source: Flickr User joyosity