Preheat the oven to 350°F. Lightly grease a 9 x 13-inch baking dish with nonstick cooking spray.

Using a serrated knife, slice the slider rolls in half horizontally, keeping the rolls connected if possible.

Place the bottom half of the rolls in the prepared baking dish.

Add the chicken. Arrange the cooked breaded chicken patties evenly over the bottom rolls. Cut the chicken into smaller pieces as needed so each slider has a portion.

Spoon the marinara sauce evenly over the chicken, spreading it to cover each piece.

Sprinkle the shredded mozzarella cheese evenly over the marinara sauce.

Add the grated Parmesan cheese over the mozzarella.

Place the top half of the slider rolls over the cheese layer.

Prepare the garlic butter topping. In a small bowl, combine the melted butter, garlic powder, and Italian seasoning. Stir until well mixed.

Use a pastry brush to generously brush the seasoned butter mixture over the tops of the rolls.

Loosely cover the baking dish with aluminum foil.

Bake the sliders. Place the baking dish in the preheated oven and bake for 15 minutes.

Carefully remove the foil and continue baking for another 5 to 10 minutes, or until the tops are golden brown and the cheese is melted and bubbly.

Remove the Chicken Parmesan Sliders from the oven and let them rest for a few minutes.

Sprinkle with freshly chopped basil or parsley, if desired.

Slice along the seams of the rolls to separate them into 12 individual sliders. Serve warm.