The sandwich is named after Ramón Barros Luco, a two-time Chilean president who reportedly ordered the same steak-and-cheese combo so often at Santiago's Club de la Unión that the kitchen named it after him.
Thin-sliced grilled beef is melted together with a slab of cheese inside a soft bread roll, served hot from Santiago's classic 'fuentes de soda' sandwich counters. It's eaten standing at the counter or wrapped to go.