It’s a round Sicilian loaf of bread with sesame seeds on top. At least that is what it was until 1906 when the Muffuletta Sandwich was invented at the Central Grocery (which is still open) on Decatur St. in New Orleans. They cut the loaf horizontally and filled it with a marinated olive salad, Salami, Ham, Mortadella, with Provolone and Mozzarella.
Italian sandwiches, Submarines, Heros, Hoagies, Grinders, Wedges, Zeppelins, Jambon Beurre, Dagoberts, and Banh Mi
Also Gatsbys and Po’Boys
They are among the longwiches. They are those made from bread longer than it is wide, split lengthwise and stuffed with things like meats and sauces and vegetables. They are typically loafwiches, though some may argue they can also be bunwiches, provided the bun has the correct dimensions