At Limoncello in Lower Nob Hill, sausages hang over a loaded deli case, shoppers browse the aisles of shelves well-stocked with every Quadratini and San Pellegrino flavor, and friendly staff wrap up sandwiches from behind the counter. Those sandwiches are the main reason we return to this Italian deli as often as Adele gravitates to tear-jerking ballads. The fillings are classic Italian, from tissue-thin mortadella and hot coppa to eggplant parmesan and spicy marinara meatballs. We’re always pulled toward the Mafioso. Getting the colorful stunner stuffed with mortadella, prosciutto, bacon, and turkey, plus pepperoncinis that add a zippy tang is the best decision you’ll make today. Eat it on the sunny sidewalk tables, or take your sandwich to-go.