Bufete Fase
Run by a father-and-daughter team, this snack bar near the top of one of the city's main shopping streets has just two things on the menu: the simple prego (a steak sandwich) and the belly-busting francesinha (a sandwich featuring cheese, cured ham, sausage, and steak, all drenched in a spicy beer-based sauce). Many locals swear they are the best in town.