Mercato di Testaccio

Un marché couvert moderne avec une rangée de stands qui préparent parmi les meilleurs repas bon marché de Rome — supplì, trapizzino, pâtes fraîches, et des marchands de produits frais installés là depuis des générations.

The market closes mid-afternoon and doesn't open Sundays, so this is a morning-to-early-afternoon stop rather than a dinner option. Late morning through early afternoon is the best window for the food stalls specifically; come earlier if you're there mainly to buy produce rather than eat.