Slice the tops of the Hawaiian rolls. Separate the Hawaiian rolls into individual portions and place them into a baking dish. Slice each Hawaiian roll 2/3 of the way down vertically.
Stuff the rolls with mozzarella cheese. Take a small amount of shredded mozzarella cheese and stuff it into each small pocket that you made in the Hawaiian rolls.
Chop and add the pepperoni pieces to the Hawaiian rolls. Make stacks of pepperoni and cut the pepperoni into 4 small pieces. Use your fingers to separate the stacked and chopped pepperoni. Place the chopped pepperoni in the same pockets that you stuffed the mozzarella cheese into.
Add more mozzarella cheese. Once the Hawaiian rolls have been filled with the pepperoni, add another layer of shredded mozzarella cheese.
Melt the butter and add seasoning. Melt the butter in a small bowl in the microwave. Stir in the minced garlic and Italian seasoning. Use a small basting brush to coat the top of the stuffed Pizza Sliders with the melted butter mixture.
Top with Parmesan cheese and parsley. Sprinkle parmesan cheese and parsley flakes over the top of the cheese and pepperoni stuffed Hawaiian roll sliders.
Bake the Pizza Sliders. Place the pan of Pizza sliders into an oven preheated to 350F. Bake them for 10 minutes, or until the cheese is melted. Remove the sliders from the oven. Serve them with a bowl of warmed pizza sauce. Dip and enjoy!
