San Francisco has long had the reputation of a great city to eat in. Its white-tablecloth grills, such as Sam’s and Tadich’s, have defined Bay Area deluxe dining literally for centuries. Since 1912, Swan Oyster Depot has been an American shrine to fresh, uncomplicated Pacific seafood. While the cuisines of the world can be sampled in restaurants around the city, some dishes bear the San Francisco brand wherever they are served. Among these are cioppino, sourdough bread, crab Louis, hangtown fry (actually from Placerville), the Joe’s special, and what’s known as mission-style burritos, meaning burritos loaded with a meal-and-a-half of meat, rice, beans, vegetables, cheese, sour cream, salsa, and more.