01 - Turn on your oven broiler to high heat for melting and toasting.
02 - Arrange split hoagie rolls on a baking sheet. Layer provolone and mozzarella slices evenly on each roll half.
03 - Place baking sheet under broiler for 1-2 minutes until cheese melts and bread edges are lightly golden. Watch carefully to prevent burning.
04 - Distribute Genoa salami, deli ham, mortadella or turkey, and capicola slices across the bottom halves of the toasted rolls.
05 - In a large bowl, toss together shredded lettuce, red onion, pepperoncini, cherry tomatoes, and black olives.
06 - Whisk mayonnaise, red wine vinegar, olive oil, dried oregano, garlic powder, salt, and pepper in a small bowl until completely smooth and emulsified.
07 - Pour prepared dressing over vegetable mixture and toss thoroughly until all ingredients are evenly coated.
08 - Mound dressed generously salad over the layered cold cuts on each roll bottom.
09 - Sprinkle freshly cracked black pepper and grated Parmesan cheese over salad topping.
10 - Place top half of each roll over filling, press down gently to compact, and serve immediately while bread remains crisp.