PREP OVEN AND PANS: Preheat the oven to 400°F. Line a large rimmed baking sheet with parchment paper or a silicone baking mat. Set aside a large skillet for cooking the chicken.
PREP ROLLS: Place the rolls on a cutting board. Using a serrated knife, slice the rolls in half horizontally, keeping them connected. Place the bottom halves cut-side up on one side of the prepared baking sheet and the top halves cut-side up on the other side.
MAKE GARLIC BUTTER: Melt 3 tablespoons unsalted butter in a small microwave-safe bowl. Stir in 1 teaspoon garlic powder. Brush the cut sides of both the tops and bottoms of the rolls with the garlic butter.
TOAST ROLLS: Bake the rolls for 8 to 10 minutes, until lightly golden and toasted. Remove from the oven and set aside. Leave the oven on.
SEASON CHICKEN: Sprinkle both sides of the chicken cutlets with ½ teaspoon kosher salt and 2 teaspoons fresh ground black pepper.
COOK CHICKEN: Heat 2 tablespoons extra virgin olive oil in the large skillet over medium-high heat. Add the chicken in a single layer and cook for about 4 minutes per side, until golden brown and cooked through. The chicken should feel firm and reach an internal temperature of 165°F.
ASSEMBLE SLIDERS: Sprinkle the grated Parmesan cheese evenly over the toasted bottom halves of the rolls. Top with the cooked chicken pieces, trimming if needed so each slider is evenly filled.
ADD SAUCE AND CHEESE: Spoon about 1 tablespoon marinara sauce over each piece of chicken. Sprinkle the mozzarella cheese evenly over the top.
BAKE: Return the baking sheet to the oven and bake for about 5 minutes, until the cheese is fully melted and bubbly.
FINISH AND SERVE: Place the top halves of the rolls back on the sliders. Cut into individual sliders and serve warm.
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Notes
Make-Ahead: The chicken can be cooked up to 2 days ahead and refrigerated. Reheat briefly before assembling.Storage: Store leftover sliders in an airtight container in the refrigerator for up to 3 days.Reheating: Reheat in a 350°F oven for 10 minutes or until warmed through. Avoid the microwave if possible to keep the bread from getting soggy.Ingredient Note: Hawaiian rolls add a slightly sweet contrast to the savory chicken and marinara, but any sturdy slider bun will work.