Although the following wasn’t discovered in rome itself but in Pompeji, it might be of interest in terms of imagening daily life in the roman empire:
Exceptionally well-preserved snack bar unearthed in Pompeii
The frescoed thermopolium, a Roman-era fast-food stall, is the first to be fully excavated
www.google.de
Archaeologists unearth ancient Pompeii snack bar complete with food residue - La Prensa Latina Media
Ancient Pompeiians Stopped at This 'Snack Bar' to Feast on Snails, Fish and Wine
考古学家已经发现了食物残留of the city’s fast food joint, called thermopolia, where hungry ancients grabbed quick meals
www.smithsonianmag.com