Cook the Sausage: In a large skillet over medium heat, cook the sausage until golden brown, breaking it up with a spoon as it cooks. Drain any excess grease.

Simmer with Sauce: Add the marinara sauce to the pan and bring to a simmer. Reduce heat to low and simmer for 15-20 minutes, until the sauce thickens slightly. Transfer the sausage mixture to a bowl and set aside.

Sauté the Peppers: While the sausage cooks, chop the onion and bell peppers. In the same skillet, heat a few tablespoons of olive oil over medium-high heat. Add the onion and peppers and sauté for 5 minutes, until softened. Season with salt and pepper (and optional garlic powder, onion powder, or Italian seasoning). Set aside.

• Prepare the Garlic Butter: In a small bowl, combine the melted butter, minced garlic, grated Parmesan cheese, and parsley. Set aside.
• Assemble the Sliders: Preheat oven to 375°F. Slice the Hawaiian rolls in half horizontally so you have a top and bottom roll for each slider in a sheet.
• Layer a few slices of provolone cheese on the bottom layer of the slider rolls.
• Add Fillings: Top the cheese (or bottom roll if not using cheese) with some of the cooked sausage mixture, then some of the sautéed peppers.
• Top with Cheese: Sprinkle with shredded mozzarella cheese. Then place the top layer of the buns onto the sausage and pepper mixture.
• Brush with Butter: Brush the tops of the buns with the garlic butter mixture.
• Bake and Serve: Bake for 25-30 minutes, or until the cheese is melted and bubbly. Serve warm with your favorite dipping sauce.