Why this pizza cone is Rome's favorite street eat

Trapizzino in Rome is one of the city's favorite street foods. It has a triangular shape and it is a hybrid between a pizza and a sandwich. Its name, in fact, is a combination of the Italian words tramezzino (sandwich) and pizza. Its fillings, however, are none of the ones of either a pizza or a sandwich. Here you can get dishes like get oxtail, tripe, or eggplant parmigiana.