Taqueria Cancun, 2288 Mission Street (at 19th Street), ☎ +1 415 252-9560. M-Th 10AM-11:30PM, F-Sat 10AM-1AM. Commonly touted as having the best vegetarian burrito in SF. If you're a meat-eater, try the Alambres (beef, peppers, onions, and bacon sauteed together, served with beans, rice, tortillas and (optional) avocado.
