On a small street in Piazza Barberini is "Hosteria Romana," a local restaurant which doesn't target tourists. This is for a local experience. Rome residents say it offers "the best antipasto in Rome."
It is a popular local restaurant serves mostly residents. Most travel sites do not review it, but it's a great place for tourists. The recommended dishes are antipasto with zucchini, artichokes, eggplant or baby fried artichokes, salted sardines fried in bread crumbs and onions, spicy celery salad, potato patties, ricotta slices and mushrooms. This is only part of what this venue has to offer.
2. Be nice to waiters. It may be of benefit when you order a special dish they don't generally offer tourists.
3. The prices here are reasonable. Leave a generous tip!