Combine San Francisco’s obsession with street food and Twitter and you get an easily trackable guide to local noshes.

Start following your favorite vendor’s tweets to get the goods—favorites around the Bay Area include Sam’s ChowderMobile, serving lobster rolls, New England clam chowder, and fish tacos; Crème Brulée Cart, serving crème brulee, natch; Left Coast Smoke, dishing out barbeque in front of various Mission bars; and RoliRoti, a mobile rotisserie whose porchetta sandwiches are particularly popular