01 -
Start by setting your oven to 350°F to warm up.
02 -
Cut the hoagie rolls into sections about 2 inches wide, but don’t slice all the way through so they stay connected at the base.
03 -
Combine olive oil, Italian herbs, garlic salt, and crushed red pepper (if using) in a small bowl. Brush the mixture over the bread, letting it soak into the cuts.
04 -
Sprinkle mozzarella cheese all over, add pepperoni slices, and finish with a layer of Parmesan cheese.
05 -
Pop the loaf in the oven and bake it for 15-18 minutes until the cheese is bubbling and the bread has crisp edges.
06 -
Serve right away with a side of marinara or pizza sauce for dipping.