Moussaka is one of the best known Greek dishes – a baked casserole consisting of ground lamb meat and layers of sliced eggplant, covered with a thick layer of bechamel sauce that gets golden and crusty as it bakes. The lamb is sometimes replaced with beef, while the eggplants might be replaced with zucchini or potatoes.

It is likely that moussaka has Middle-Eastern origins, and it was introduced when the Arabs brought the eggplant to Greece. Its Greek name mousakás is derived from the Turkish musakka, which came from the Arabic word musaqqa'ah, meaning chilled. 

Gyros is one of the most popular Greek street food dishes, consisting of meat such as pork and chicken (in Greece) or lamb and veal (popular in other countries) cooked on a vertical spit. The meat is sliced in thin shavings and is then usually placed in a pita bread along with sauces such as tzatziki and vegetables such as tomatoes, onions, lettuce, and cucumbers.

Gyros is derived from the Greek word gheereezo, meaning to turn, referring to the constantly rotating vertical spit on which the meat is cooked. Some believe that gyros originated during the time of Alexander the Great, when his soldiers skewered the meat on their swords and cooked it over a fire. 

Souvlaki is one of the most popular Greek dishes, consisting of small cubes of skewered and grilled pork, chicken, lamb, or beef. It is a popular fast food item that is usually served in souvladzidika, small eateries that also often serve gyros and other similar grilled meat dishes.

Souvlaki first appeared in ancient Greece, when it was called kandaulos, consisting of a combination of grilled meat, pita bread, cheese, and dill. The name of the dish is a diminutive of the Greek word souvla, meaning spit. 

Tzatziki is a Greek concoction made from yogurt, cucumbers, garlic, and numerous herbs and spices such as dill, mint, or parsley. It is usually served as a sauce accompanying many meat dishes, as a simple dip, or an appetizer. Its name is derived from the Turkish word cacik, denoting a very similar dip, although some suspect that tzatziki was derived from the Indian raita dip.

Tzatziki is always served cold, and it is especially popular to serve it with dishes such as gyros and souvlaki. Often, it is served with pita bread as part of the first course of a big meal. With its huge popularity, and the fact that it is one of the best summer dips, it is not strange that there are many regional variations of tzatziki, in countries such as Iran, Iraq, Turkey, Cyprus, Bulgaria, and Serbia.