O'Tacos is a quick-service chain built on the so-called French taco — not a Mexican taco, but a folded wheat tortilla stuffed with fries, meat, and a signature melted cheese sauce, pressed like a panini. The brand turned an originally regional street snack into a standardized, build-your-own product: the customer picks meats or a vegetarian option, a size, and the sauce, and adds sides, a milkshake, and drinks. It positions itself as the leader of branded French tacos.