most of the regular Indian restaurants in the US are not very good as they are swimming in excess grease which is extremely unhealthy. One of the best restaurants in the DC area is Rasika which is very close to the MCI center in the Penn quarter. It is owned by the same group as the Bombay Club which is very close to the White house. Both are excellent especially the tandoori salmon. For desert try the kulfi(ice cream) with berries.