01 - Turn on your oven's broiler function to prepare for melting the cheese and toasting the bread.
02 - Arrange the split hoagie rolls cut-side up on a baking sheet. Layer each roll with one slice of provolone and one slice of mozzarella cheese.
03 - Place the baking sheet under the broiler for 1 to 2 minutes, watching carefully, until the cheese is melted and bubbly and the bread is lightly golden. Remove from oven.
04 - Distribute the Genoa salami, deli ham, mortadella or turkey, and capicola evenly across the bottom halves of the toasted rolls.
05 - In a large mixing bowl, combine the shredded lettuce, sliced red onion, pepperoncini, cherry tomatoes, and black olives.
06 - In a small bowl, whisk together the mayonnaise, red wine vinegar, olive oil, dried oregano, garlic powder, salt, and black pepper until fully emulsified and smooth.
07 - Pour the dressing over the vegetable mixture and toss thoroughly to ensure every piece is evenly coated.
08 - Mound a generous portion of the dressed salad on top of the layered meats on each roll.
09 - Sprinkle each sandwich with freshly cracked black pepper and grated Parmesan cheese if desired.
10 - Place the top halves of the rolls on the sandwiches, press down gently to compact, and serve immediately while the cheese is warm and the salad is crisp.