I Suppli in Rome's Trastevere sells suppli, fiori di zucca and potato croquettes by weight from €3 to €8 per portion, with the 19:00 fryer batch the freshest.
Try: Suppli, fritti misti
Tip: Cash only. Open 11:00-22:00; standing room only. Mixed fritti box is €8 for two to share.
Mordi e Vai in the Mercato di Testaccio in Rome sells Sergio Esposito's slow-braised allesso di scottona (beef shoulder) sandwich for €5, the city's defining.
Try: Roman braised-meat sandwich
Tip: Closed Sunday all day. The allesso di scottona with chicory is 5 euros; queue forms 12:30 onward.
Stefano Callegari's Trapizzino in Rome sells the namesake pocket of pizza bianca stuffed with Roman braised meats for €5 each, with the pollo alla cacciatora.
Try: Trapizzino (pizza pocket with Roman braise)
Tip: Open 12:00-24:00 daily. Two trapizzini for lunch run €10; cash and card.
Arcangelo Dandini's Supplizio in Rome's Centro Storico is the specialist suppli counter at €3 each. Two suppli and a glass of wine runs under €10 for a quick.
Try: Suppli al telefono
Tip: Open Tue-Sun 12:00-22:00; closed Monday. Cash and card Cash is faster than card.