Preheat your oven to 350°F.
Slice the Hawaiian rolls in half horizontally while keeping the rolls connected.
Place the bottom half of the rolls into a baking dish or on a baking sheet.
Layer the ingredients in this order: Provolone cheese, Salami, Pepperoni, Ham
Place the top half of the rolls back on top.
Using a sharp knife, cut the assembled sliders into 12 individual sandwiches.
In a small bowl, combine the melted butter, grated Parmesan cheese, and garlic powder.
Brush the mixture evenly over the tops of the sliders.
Bake for 15–18 minutes, or until the cheese is melted and the tops are golden brown.