Greek Salad Tidbit is a term used to describe an OLIVE, which is a small fruit that grows on trees and is a common ingredient in Greek salads. Olives are usually green or black in color and have a salty, briny flavor. They are often pitted and stuffed with ingredients such as garlic, herbs, and cheese. Olives are a popular snack food and are also used to make OLIVE oil, which is a staple of the Mediterranean diet.