Despite looking simple, the classic version leans entirely on the marinade — a thin steak cooked fast in a garlicky, wine-and-bay sauce that soaks straight into the bread.
A thin beef steak is pan-seared in garlic, butter and a splash of white wine, then tucked whole into a crusty roll with the pan juices soaked into the bread. A fast, cheap staple at Lisbon's tascas and café counters.