The term RELISH TRAY ITEMS can refer to a variety of items that are typically served on a relish tray, such as olives. Olives are a type of fruit that is usually cured and pickled before being served. They are often served as part of an appetizer or snack platter, and can be found in a variety of flavors and sizes. Other common items that may be served on a relish tray include pickles, peppers, onions, and tomatoes.