Get ready for pure indulgence and a very full belly! Polpettone are giant cheese stuffed and breaded meatballs! They're easy to make and delicious to eat!
In a large mixing bowl, add the ground beef, onion, garlic, 1 cup breadcrumbs, parmesan cheese, eggs, salt, and pepper. Using your hands, mix to completely combine all of the ingredients.
Divide the mixture in half in the bowl and then divide each half into thirds, so that you can make sure to get 3 patties from each half, for a total of 6. Take one of the 6 sections of beef and form it into a 1-in thick patty.
Place mozzarella cheese in the center of the patty and then gently fold the sides of the patty up around the cheese so you can no longer see any of the cheese.