Preheat the oven to 400°F.
On medium heat, sauté the onion until translucent.
Meanwhile, add the ground beef and spices to a mixing bowl and combine.
Once the onion is cooked, roll the ground beef into balls and place onto the skillet.
Bake the meatballs for 30 minutes covered.
Remove from the oven. Cover the meatballs in marinara sauce, provolone cheese, mozzarella cheese, and finish with pepperoni.
Bake uncovered for another 10-15 minutes until the cheese has fully melted.
Remove from the oven and serve with your favorite pasta!