Nearby, Panda Gourmet is great:
http://www.washingtonpost.com/goingoutguide/the-20-diner-panda-gourmet-dazzles-with-genuine-sichuan-and-shaanxi-cooking-at-a-days-inn/2013/08/28/cef3a876-0b9c-11e3-b87c-476db8ac34cd_story.html
However, it's not on the Hill, but at NY and Bladensburg, about a 10-15 minute drive, depending on where you are. They also supposedly deliver, but about 2/3rds o the time we've called, their delivery guy wasn't working.