I don't care if it's Greek to me, I'll take it!.
The Greek Taverna is everything a Greek restaurant should be. It is run by the nicest Greek family (if you go enough times, they will certainly remember you), and your waiters are even Greek! Start off with some Greek wine, and enjoy the delicious homemade bread - but save room for the hummus and pita! My favorite entrees include the stuffed chicken breast and the chicken (or shrimp) ka-bobs (all entrees come with a house salad). Their lamb and fresh seafood are also to die for. If you can, order some dessert and a coffee for after dinner.
Another great thing about the Greek Taverna is that it has a big, beautiful, grape-covered outside eating area - a rarity in McLean!