Heat the grill to high heat.
In a small bowl, melt the butter then stir in the seasoning.
Place the pepperoni in between two paper towels, not overlapping each other.
Microwave for 15 seconds and set aside.
Shape the meat into 4 patties, place a little sausage in the middle of each and gently fold together then shape into patties again and sprinkle with salt and pepper
Turn the heat to medium high and place each patty on the grill for 2-3 minutes per side.
Meanwhile, brush each bun with the butter mixture and place on the grill for a minute or until grill marks appear.
Place a patty on each bun, top with a little sauce and cheese, then the pepperoni. I like to put this on a pan and place them under a broiler, but you could also turn off half of the grill, set them on tin foil and close the lid to melt the cheese.
Sprinkle a little parmesan cheese and top with the lid of the buns.