Preheat the Oven: Begin by preheating your oven to 400°F (200°C) to ensure even cooking. Line a 9×13 baking dish with parchment paper for easy cleanup and to prevent the sliders from sticking during baking.
Prepare the Lettuce Mixture: In a medium-sized mixing bowl, combine the shredded lettuce, diced red onion, banana peppers, mayonnaise, dill relish, and Italian dressing. Stir thoroughly until all ingredients are evenly coated. Cover the bowl with plastic wrap and place it in the refrigerator to chill while you prepare the rest of the sliders.
Cook the Meats: Heat a large skillet over medium heat. Add the chopped turkey, pepperoni, and salami, and cook for 3–5 minutes, stirring occasionally, until the meats are warmed through and lightly browned. Remove from heat and set aside.
Toast the Bottom Rolls: Place the bottom halves of the Hawaiian rolls in the prepared baking dish. Spread an even layer of mayonnaise over the rolls. Bake in the preheated oven for about 8 minutes, or until the rolls are lightly toasted. This step helps create a sturdy base for the sliders and prevents sogginess.
Assemble the Sliders: Remove the toasted rolls from the oven. Start by layering provolone cheese slices over the toasted rolls, ensuring full coverage. Next, evenly spread the cooked meat mixture over the cheese layer. This ensures consistent flavor in every bite.
Add the Top Rolls: Carefully place the top halves of the rolls over the assembled layers, aligning them with the bottom rolls for a uniform appearance.
Prepare the Butter Mixture: In a small bowl, combine the melted butter with garlic powder, oregano, and basil. Use a pastry brush to generously coat the tops of the rolls with the butter mixture. Reserve a small amount of the butter mixture for additional brushing later.
Bake the Sliders: Cover the baking dish with aluminum foil, ensuring the foil doesn’t touch the tops of the rolls. Bake the sliders in the preheated oven for 5 minutes. Then, remove the foil and bake for an additional 5–7 minutes, or until the tops are golden brown and the cheese is fully melted.
Add the Lettuce Mixture: Once baked, carefully remove the top halves of the rolls. Spread the chilled lettuce mixture evenly over the meat layer. Replace the top rolls, pressing gently to secure them. If desired, brush the tops with the remaining butter mixture for extra flavor.
Serve and Enjoy: Allow the sliders to cool slightly for 2–3 minutes. Use a sharp knife to slice them into individual portions. Serve them warm.