The most traditional Greek salad recipe, and the kind of Greek salad you will usually encounter in Greece, does not typically include lettuce, but is more a bowl of raw chunky vegetables with a little olive oil and lemon juice.
The flavors of this dish just get better and you can store leftovers and use with grilled meats or in sandwiches made with pita pockets.
The rich, zesty vinaigrette gets great authentic flavor from the fresh oregano, and is further enhanced by the fresh mint and parsley.
Marinating the onion and cucumber slices in the vinaigrette helps tone down the raw onion in the salad.