I've called around to a bunch of restaurants to find out who is open Easter Sunday and Easter Monday. Here's what ive come up with. FYI Antico Arco has voicemail for bookings and L'Asino d'Oro takes email bookings. For the others, a phone call is the best and they should all, hypothetically be able to handle bookings on the phone in English.
Antico Arco: creative cuisine which draws inspiration from the ingredients and recipes of southern Italy. Expensive, but not excessively so. Open for dinner only both Easter Sunday and Easter Monday. Call +39065815274 for reservations.
Cul de Sac: This long established wine bar near Piazza Navona has more than 1,500 (mostly Italian) labels and a nice selection of cheeses, pates, and salamis. It has outdoor seating, a huge improvement on the uncomfortable benches inside. Open both Easter Sunday and Easter Monday for lunch and dinner. Call +39066 8801094 for bookings (I think they only take reservations for 1230pm and 630pm).
Da Danilo: Roman food with a hint of modernity. Da Danilo is home to one of my favorite carbonaras in the city. Be sure to specify a table upstairs. Open on Easter Sunday at lunch. Call +390677200111 for bookings.
Flavio Velvevodetto: moderately priced Roman cuisine with outdoor seating. Open both Easter Sunday and Easter Monday for lunch. Call +39065744194 for bookings.
La Campana: Classic Roman cuisine in a familial setting. Open Easter Sunday at lunch and dinner. Call +39066875273 to book.
L’Asino d’Oro: Chef Lucio Sforza serves “Umbrian soul food” at moderate prices in Monti. Outdoor seating available. Open Easter Sunday for both lunch and dinner and Easter Monday at lunch only. Call +390648913832 for reservations.
Roma Sparita: This restaurant and pizzeria with outdoor seating is famous for its cacio e pepe, served in a cheese basket. They also do excellent carciofi alla giudia and reliable Roma classics. Open Easter Sunday for lunch. Call +39065800757 for reservations.
This is just a round-up of places I particularly like. Im sure there are others so please add your favorites to the thread. I also want to add La Gensola with a disclaimer. It is open Sunday at lunch and dinner but their Sunday service is a nightmare, as they can't handle the volume of business they do. This inevitably means regulars get much more attention than visitors...just a heads up
Piazzale Aurelio, 7, Roma 00151, IT
Vicolo della Campana, 18, Roma, IT 00186, IT
Cul de Sac
Piazza Pasquino, 73, Rome, Lazio , IT
Roma Sparita Pizzeria
Piazza di Santa Cecilia, 24, Rome, Lazio 00153, IT
Piazza della Gensola, 15, Rome, Lazio 00153, IT
Via del Boschetto 73, Rome, Lazio 00184, IT
Via Petrarca 13, Rome, Lazio , IT
Via di Monte Testaccio, Rome, Lazio 00153, IT