Greek Salad Toppers is a term used to describe the various ingredients that can be added to a Greek salad. Feta cheese is one of the most popular toppings for a Greek salad, and it is a type of cheese made from sheep's milk or goat's milk. It has a salty, tangy flavor and is often crumbled over salads. Other common Greek salad toppings include olives, tomatoes, cucumbers, onions, and peppers.