Lee Kum Kee Peking duck sauce is the classic accompaniment to crispy aromatic duck and rich roast Peking duck. The sauce is both spicy and sweet at the same time, and is made from a blend of aromatic spices and umami-rich soybeans. Also use the Peking duck sauce in marinades for roast meats, or toss a tablespoon through a stir fry for a quick meal.