01 -
Preheat your oven to 350°F.
02 -
Cut the hoagie rolls into 2-inch wide portions but leave them attached in the middle to form a loaf-like base.
03 -
In a small bowl, mix together the olive oil, Italian seasoning, garlic salt, and red pepper flakes (if using). Brush the mixture onto the bread, ensuring it seeps into the cuts.
04 -
Top the bread with shredded mozzarella cheese, pepperoni slices, and Parmesan cheese.
05 -
Place the prepared bread in the oven and bake for 15-18 minutes, or until the cheese is melted and the bread is crispy.
06 -
Serve hot with marinara or pizza sauce for dipping.