Kumquat

noun: small citrus fruit originating in central China but now cultivated in the Far East, Australia and America. Sometimes called Chinese oranges - can be eaten whole, including the skin, or used for pickling and preserves. They are tart in taste, like lemons. Choose small, shiny fruits. Wash and eat them whole, poach them in sugar syrup and serve with ice cream, or use in a fruit salad.