Rialto, set in the handsome Charles Hotel, is an eclectic restaurant whose menu focuses on regional Italian specialties prepared with the freshest a New England influence. Representative third courses include braised short rib with gorgonzola-potato fritter, pan-roasted ray with pine nuts and citrus butter, and halibut in lobster broth with fennel, mussels and squid. This romantic spot also dazzles palates with dessert offerings ranging from bombolini with tangerine mascarpone to honey-lemon pine nut tart with gelato.