Preheat your oven to 350°F (175°C).
Cut the entire sheet of rolls in half horizontally (don’t separate them individually). Place the bottom halves in a greased 9x13 baking dish.
In a small bowl, mix mayo and Italian dressing. Spread this onto the cut side of the bottom buns.
Layer on provolone cheese, salami, ham, pepperoni, mozzarella cheese, banana peppers, and red onion.
Place the top half of the rolls on and press down gently.
Stir together melted butter, Italian seasoning, and Parmesan. Brush over the tops of the sliders.
Cover with foil and bake for 15 minutes. Remove foil and bake for another 5 minutes, or until the tops are golden and crisp.
Let them cool slightly before slicing and serving.