Greek Salad Toppings are a popular addition to the traditional Greek salad. Feta cheese is one of the most common toppings, and is a salty, crumbly cheese made from sheep's milk or a combination of sheep and goat's milk. Other popular toppings include olives, tomatoes, cucumbers, onions, and peppers. These toppings add flavor and texture to the salad, making it a delicious and nutritious meal.