The kumquat is a small, citrus fruit that belongs to the Rutaceae family. It is typically oval or round in shape and has a bright orange or yellow skin. Unlike other citrus fruits, the kumquat is unique because its skin is sweet while the flesh inside is tart. This combination makes it a popular choice for snacking and cooking. Kumquats are often eaten whole, including the skin, and can be used in various dishes, jams, and desserts. They are rich in vitamins, particularly vitamin C, and are low in calories, making them a healthy snack option.