PREP: Preheat the oven to 350°F (175°C). Generously grease a 9x13-inch baking pan. Line pan with parchment paper.
BUTTER: In a microwave-safe bowl, melt the butter. Let it cool slightly, then whisk in the remaining ingredients listed under "butter."
BRUSH ON BUTTER: Using a serrated bread knife, carefully slice the entire block of Hawaiian rolls in half horizontally, keeping the individual rolls attached (See Note 1). Place the bottom half of the rolls in the prepared pan.Brush 2 tbsp of the butter mixture on the cut sides of both the top and bottom halves of the rolls (using 4 tablespoons in total).
LAYER IN FOLLOWING ORDER: 6 slices of cheese, ham, salami, pepperoni, red pepper strips (if using), and 6 remaining slices of cheese. Do not add the top slab of rolls yet. Bake, uncovered, for 10 minutes.
BAKE AGAIN: Remove pan from oven and place top half of the rolls onto the sliders. Brush the top and sides of the rolls generously with the remaining butter mixture. If using, sprinkle grated Parmesan cheese on top. Cover pan with foil and bake for 20 minutes. Remove foil and bake for an additional 5-10 minutes, or until the top is golden brown and the cheese has melted.
ENJOY: Serve hot, cutting into individual sliders. Serve with warmed marinara sauce.
Video
Notes
Note 1: Rolls: Keep the rolls intact and slice them in half horizontally.Note 2: Pepperoni and salami: We prefer deli-sliced pepperoni and salami. Since deli slices are larger, you'll only need about 12 slices. If using smaller, packaged meats, you'll need about 24. Adjust the quantity to your preference.Note 3: Red peppers: If you're not a fan, feel free to omit them. 8 oz is roughly one cup. Thoroughly drain and squeeze out extra moisture with a paper towel. Ensure they're very dry before adding to sliders.