Boudin is a San Francisco based bakery, famous for its sourdough bread. We normally stay around Union Square when we go to the city. Occasionally, when we are hungry and can't think of any place to go to for a meal, we are quite happy that we could always go to Boudin in Macy's Union Square. They have nice bread, offers sandwiches etc.
The picture above is their Clam Chowder and the sandwich below, I believe, is Turkey Cranberry, Forgive me for not remembering, this was from our trip in August last year.