My go-to for Indian food is definitely Tiffin in Takoma Park.
It has now consolidated with Udapi Palace, so you can also get amazing vegetarian food. I’ve been to Tiffin a few times for dinner and once for the lunch buffet. The lunch buffet was an incredible value. They kept refilling all of the dishes, and everything I tried was excellent.
For dinner, I tend to order a lamb dish. This last visit I ordered the Lamb Sheekh Kabab. My only complaint is that I wish it came with some kind of sauce. I really liked their rice and also the naan. My buddies got the Lamb Palak and also a chicken dish. We all really enjoyed our meals.