Manhatten Deli, best quick food within a block of the Mall.
Jaleo (E and 7th St), a tapas bar with the best food of any of the restuarants along 7th Street.
Washington's small Chinatown starts at 7th and H. The section is made up of around 20 decent, inexpensive restaurants.
The District Chop House which has happy hour beer specials and first rate french fries. The restuarant is between D and E street on 7th Street.
CoCo Loco Friday Happy Hour (4-7 pm). They put up enough free food for a traveler to have a filling dinner.
Quick Tips:
The pizza at the Manhatten Deli (.85 a slice) is probably one of the best quick lunches you can get close to the Mall. The pizza is good and the slice large, a lot better deal than you will get for the cardboard the vending trucks right at the Mall sell as pizza.
Best Way To Get Around:
You can take a short taxi ride but the restaurants along 7th Street are only a 10 minute walk from the Mall.
Seventh Street runs through the Mall between the West Building of the National Gallery of Art and the gallery's new sculpture garden. The restaurants are a few blocks up the street into Northwest Washington. You are walking the right way from the National Gallery if you go towards the National Archives and the U.S. Trade Commission. If these buildings don't stand out from the other hulking federal buildings, look further up the street for a red-bricked, gold-domed building on the right.