6 sandwich rolls, sliced lengthwise but attached 18 slices deli ham 18 slices Genoa salami 18 slices mortadella 1 cup banana peppers, sliced 1/2 red onion, thinly sliced 6 slices provolone cheese FOR SERVING: Italian dressing Shredded iceberg lettuce Pepperoncinis Sliced tomatoes Preheat oven to 350°F. Arrange rolls in a 9×13-inch baking dish, sliced side…