1317 Pennsylvania Ave SE
This unassuming, hole-in-the-wall Italian spot is among D.C.'s best kept sandwich secrets. On any given day, the line at the little counter-service joint will likely consist of a few cops, a construction worker, and the folks who live in the apartment next door -- the place is strictly local. Sandwiches like "The G-Man," (ham, salami, mortadella, pepperoni, fontina, provolone, and oregano on thick-cut Italian bread) make sure Mangialardo's customers always leave satisfied -- and if that four-meat combo doesn't to it, "The Big G" (same as "The G-Man" but with double the meat and double the cheese) will certainly do the trick. The cash-only eatery has prices that rarely exceed 10$, even when you add chips and a soda to your mountain of a sandwich, and the native D.C. meat-mongers who run the place are an integral part of its local charm.