Preheat your oven to 375°F (190°C).

Carefully slice the Italian sub rolls in half lengthwise and arrange them cut side up on a baking sheet.

In a medium bowl, melt unsalted butter and mix in garlic powder, onion powder, dried oregano, dried basil, red pepper flakes, salt, and black pepper.

Brush the rolls with the melted butter mixture, ensuring even coverage.

Layer the salami, ham, pepperoni, mozzarella, and provolone on the bottom halves of the rolls.

Sprinkle grated Parmesan cheese over the layers, then add roasted red peppers, black olives, banana peppers, and fresh basil.

Bake for 10-12 minutes until the cheese is melted and bubbly, and the bread is golden brown.

Let the sandwiches cool for a couple of minutes before slicing into individual portions.

Serve warm with a fresh garden salad or crispy fries.