Paul Kee, 11305-B Georgia Avenue, Wheaton, MD, 301-933-6886 (Metro Trip Planner – opens in new window) [Washingtonian | WaPo | City Paper | Yelp]
One of the best Cantonese places around, although you hardly ever hear of it. Excellent seafood. I like the scallops in pepper sauce, among other dishes. There are also the casseroles, and make sure you get some greens to round out the combination.