01 - Preheat oven to 375°F. Grease a 9x13-inch baking dish with butter or nonstick spray.
02 - Using a bread knife, slice the slider buns horizontally in one piece to create a top and bottom slab, keeping the individual rolls attached to one another. Place the bottom slab into the prepared baking dish.
03 - Spread the pizza sauce evenly across the bottom bun slab. Sprinkle half of the shredded mozzarella (1 cup) over the sauce in an even layer.
04 - Arrange the pepperoni slices in a single, even layer over the mozzarella. Top with the remaining 1 cup of shredded mozzarella.
05 - Set the top slab of buns over the layered filling, pressing down gently to adhere.
06 - In a small bowl, combine the melted butter, honey, hot sauce, garlic powder, and dried Italian herbs. Whisk until smooth. Generously brush the mixture over the tops and sides of the buns using a pastry brush.
07 - Sprinkle the grated Parmesan evenly over the glazed bun tops. Add a pinch of red pepper flakes if desired for extra heat.
08 - Cover the baking dish loosely with aluminum foil and bake for 15 minutes. Remove the foil and continue baking for an additional 5 minutes, or until the cheese is fully melted and the tops are golden brown.
09 - Remove from the oven and let rest for 3 to 5 minutes. Garnish with chopped fresh basil if desired. Slice along the individual roll seams and serve warm.