01 - Turn on your oven broiler to prepare for toasting the sandwich rolls.
02 - Lay open the rolls on a baking sheet and layer each half with provolone and mozzarella cheese slices.
03 - Place under the broiler for 1–2 minutes until cheese begins to melt and bread becomes lightly toasted. Remove from oven.
04 - Distribute salami, ham, mortadella (or turkey), and capicola evenly across the bottom half of each roll.
05 - In a large mixing bowl, toss together shredded lettuce, red onion, pepperoncini, cherry tomatoes, and black olives.
06 - In a small bowl, whisk mayonnaise, red wine vinegar, olive oil, oregano, garlic powder, salt, and black pepper until emulsified and smooth.
07 - Pour prepared dressing over vegetable mixture and toss thoroughly until all ingredients are evenly coated.
08 - Mound a generous portion of dressed salad on top of the layered meats on each roll.
09 - Sprinkle with freshly cracked black pepper and grated Parmesan cheese if desired.
10 - Place the top half of each roll on the sandwich, press down gently, and serve immediately.