I think the *best* Indian food in Bethesda and Rockville are Passage to India (Bethesda), Bombay Bistro (Rockville), and Spice Xing (Rockville). Up to you to determine, and order, healthily.
98 W Montgomery Ave, Rockville, MD 20850
100-B Gibbs Street, Rockville, MD 20850
Passage to India
4931 Cordell Ave, Bethesda, MD 20814