I visited D.C. recently and had the pleasure of eating at Amma Vegetarian Kitchen in Georgetown; it was the best Indian food I've had in a long time!! You go up some stairs and enter a small-ish room, and wonder whether you're in the right place, but once you see the menu and then when you've been served your food, you realize that this is *definitely* it! The service was fast and cordial, portions were generous, and all of the prices were very reasonable - averaging around $9 for dinner, if I remember correctly. I recommend the samosa, parippu vada, any of the dosai, the vegetable korma, and the puri. Yum!!