I start by mixing mayonnaise, shredded lettuce, banana peppers, red onion, and Italian seasoning in a bowl. I make sure everything is evenly combined so each bite tastes balanced. This spread is what gives the sliders their signature grinder flavor.
Next, I carefully slice the Hawaiian rolls in half horizontally, keeping them connected. I place the bottom half into a greased baking dish, which helps keep everything neat and easy to assemble.
I layer provolone cheese first, followed by ham, salami, and pepperoni. This order helps the cheese melt into the bread while warming the meats evenly. I finish with another layer of provolone for extra meltiness.
I place the top half of the rolls back on, gently pressing them down. This helps the layers stick together and makes slicing easier after baking.
I mix melted butter with garlic powder and brush it generously over the tops. Then I sprinkle grated parmesan evenly, which creates a flavorful, golden crust as it bakes.
I bake the sliders at 350°F until the cheese is melted and the tops are lightly golden. The rolls should be warm all the way through but not overly crispy.
Once baked, I lift off the top rolls, spread the grinder mixture evenly over the meat and cheese, then place the tops back on. I slice and serve while warm for the best texture and flavor.