Mercato Testaccio is a daily market inside a roman archeological site with over 100 stands of fresh produce, gourmet food, clothing, and even furniture. At the testaccio market, you can try anything from Poke, to Calabrian sandwiches, to 2.50 euro glasses of wine and cheese boards. And of course, in the middle of all the action, is an authentic Italian coffee bar. Come in the afternoon and enjoy a coffee paired with whatever snack you grab from another stand, and listen to some live music from a local musician. Mercato Testaccio is open everyday except for Sunday from 7 am to 2:30 pm.
Via Aldo Manuzio, 66b, 00153 Roma RM
Marigold is a restaurant amd micro bakery owned by chef Domenico Cortese and Baker Sofie Wochner located in the Ostiense neighborhood of Rome. They roast their own beans, and serve artisan coffee, tea, juices, and cocktails, and a variety of farm to table meals and pastries. Their kitchen uses organic, seasonal ingredients that they source from small businesses in Italy or forage from Rome's backyard. They are open Wednesday to Sunday from 9 am to 3 pm. My personal favorite is their batch brew balck coffee and the banana bread with housemade salted butter.
Via Giovanni de Empoli, 37, 00154 Roma RM