01 -
Heat your grill, pan, or preferred cooking surface to high temperature.
02 -
Combine ground beef, Italian sausage, and pizza seasoning (oregano, basil, marjoram, garlic). Divide mixture into 8 oz portions (or smaller 6 oz if preferred) and shape into patties about 1/2 inch larger than the hamburger buns. Press a thumbprint in the center of each patty to prevent puffing during cooking.
03 -
Grill patties for approximately 4 minutes on the first side.
04 -
Simultaneously, heat marinara sauce in a pan over medium-low heat until warmed. Heat pepperoni slices on a pan or tinfoil on the grill for a couple of minutes.
05 -
Flip the patties and cook for another 2 to 4 minutes until the internal temperature reaches 140°F for medium doneness. Place a slice of mozzarella cheese on each patty about a minute before removing from the grill.
06 -
Place the hamburger buns face down on the grill and toast for 1 to 2 minutes.
07 -
Place the cooked patties onto the toasted buns. Spoon warm marinara sauce on top, add heated pepperoni slices, and sprinkle with Parmesan cheese. Serve immediately.