Preheat your oven to 375°F.
Slice the sub rolls in half lengthwise and lay them open on a baking sheet.
Layer the salami and pepperoni evenly on the bottom halves of each roll.
Top with slices of provolone or mozzarella.
Bake for 8–10 minutes, until the cheese is fully melted and bubbling at the edges.
While they're baking, mix the mayo, Italian dressing, oregano, and garlic powder in a small bowl.
Once the subs come out, spread the mayo mixture on the top halves of the rolls.
Pile on the shredded lettuce, and add tomatoes or banana peppers if you're using them.
Close the sandwiches, slice in half, and serve while they're still warm and the cheese is stretchy.
