Fodor's Expert Review Mordi e Vai
Sergio Esposito's stand at what will forever be called the "New" Testaccio Market (it moved in 2012) sells the best sandwiches in town. Meatballs, tongue, tripe, and other Roman classics are generously smothered on fresh bread, and there is always a vegetarian option, too. Grab a seat at the bar tables they have arranged in the stall next door and watch the general hustle of Romans lining up for their daily fix of panino perfection. It's open during market hours (Monday–Saturday 8–2:30).
Via Beniamino Franklin
Rome, Latium 00153, Italy