The traditional cheese used in Greek salad is feta cheese. Feta is a brined curd cheese made from sheep's milk or a mixture of sheep and goat's milk. Known for its crumbly texture and tangy flavor, feta adds a distinctive taste to Greek salads, which typically include ingredients such as tomatoes, cucumbers, olives, and red onions, dressed with olive oil and oregano. Beyond salads, feta is also used in various Mediterranean dishes, making it a key ingredient in many cuisines. Its cultural significance has led to its protection as a traditional product in Europe.