Guy Fieri tries out favorites from around the corner and around the globe. In Chicago, a Peruvian joint serving classic lomo saltado (sauteed rib eye with French fries mixed right in) and beef heart; in Oklahoma City, a local institution where the bread's baked fresh daily and the schnitzel's done like back in Germany; and in South Buffalo, N.Y., a pub making the home town favorite, a sandwich called "beef on weck".