While i was in Athens i got to try and a wonderful little dish called Tzatziki. The last time i had this was at a Turkish restaurant in New York with cracked bread (the turks call it Cacike)
Anyway, this is a sublime dish, enough to rock your socks and tingle your taste buds. It can be head for breakfast and as an appetizer for lunch or dinner and if you are particularly fond of it (like i am) as a whole meal.
This restaurant round the corner from our hotel in Athens served it with Bread soaked in olive oil and herbs. By the time we would get done with it there was really no more hunger left (well throw in a bottle of house wine at 3Eur , what else is going to happen)
One of my best friends mum makes a dip very similar to this, except she leaves the cucumber out and lets the yoghurt in thicker.