Kumquats are a small citrus fruit that originated in China and are now widely grown in many parts of the world. They are known for their distinctive sweet and sour flavor, and their small size makes them a popular snack or garnish for drinks and meals. Kumquats are unique among citrus fruits in that their skin is sweet and their flesh is sour, making them a versatile ingredient in both sweet and savory dishes. They are also rich in vitamin C and fiber, making them a healthy addition to any diet.