The tramezzino is a soft, crustless Italian sandwich that originated in the 1920s in Torino. Angela Demichelis and Onorino Nebiolo introduced it at Caffè Mulassano after returning from the U.S. It uses soft bread, similar to "Wonder bread," and was first filled with butter and anchovies. Named by poet Gabriele D'Annunzio, the tramezzino has become a beloved Italian classic, showing how new food ideas can quickly become traditions.