The best sandwiches in Washington, D.C., are made at a new place in Georgetown, Stachowski's Market & Deli. The one I always order is the braunschweiger—a housemade liverwurst made from fatty pork and pork liver, onion, ginger, and other seasonings. It's sliced onto rye bread and smothered in sweet pickles, red onions, and hot mustard. The braunschweiger has a pure, meaty flavor, and the condiments really bring the sandwich together. I've been telling everyone to try it.