Kim's Restaurant has excellent, inexpensive, and quick vietnamese food. It's great for those looking to pick up lunch during a busy day at the capitol. I love the egg rolls and Bánh mì, but they have excellent phở, chow mein, and rice dishes as well!
Here is a link to their menu on Yelp, I hope to add our own image of the menu to the wiki soon.
They're lunch oriented, and thus only open from 10am to 3pm Monday through Friday.