Preheat the oven to 400℉. Line a sheet pan with parchment paper and set aside.
In a small bowl, mix together all the ingredients for the garlic butter.
½ cup salted butter, 6 garlic cloves, 1 tablespoon chopped fresh parsley
Cut the bread in half lengthwise to make 2 long pieces, just like garlic bread.
1 pound French bread
Spread half of the butter mixture on each piece of bread. Place the bread, cut side up, on the prepared sheet pan. Bake for 5 minutes.
Remove from the oven and spread ¼ cup pizza sauce on each bread.
½ cup pizza sauce
Evenly divide the shredded mozzarella, pepperoni, and parmesan between the slices of bread.
8 ounces low-moisture mozzarella cheese, 15 pepperoni slices, 2 tablespoons parmesan cheese
Bake for 15-18 minutes or until cheese is bubbly and the edges of the bread are golden. Remove from the oven and let sit for 2-3 minutes.
Garnish with red pepper flakes, parsley, and more parmesan, if desired. Slice and serve.
red pepper flakes, chopped fresh parsley