Duck sauce

Duck sauce is a condiment with a sweet and sour flavor and a translucent orange appearance similar to a thin jelly. Offered at American Chinese restaurants, it is used as a dip for deep-fried dishes such as wonton strips, spring rolls, egg rolls, duck, chicken, fish, or with rice or noodles. It is often provided in single-serving packets along with soy sauce, mustard, hot sauce or red chili powder. It may be used as a glaze on foods, such as poultry. Despite its name, the sauce is not prepared using duck meat; rather it is named as such because it is a common accompaniment to Chinese-style duck dishes. It is made of plums, apricots, pineapples or peaches added to sugar, vinegar, ginger and chili peppers. It is used in more traditional Chinese cuisine in the form of plum sauce.

Source: Wikipedia