David Twining’s Nantuckets Restaurant (Costal Highway at Atlantic Avenue, 539-2607) is a cozy place famous for its comfortable lounge and quahog and scallop chowdah, crab cakes and lobster shepherd’s pie. Mancini’s Brick Oven Pizzeria and Restaurant (907 Coastal Hwy., 537-4224) is a classic trattoria that serves all your Italian favorites, as well as seafood.