1-First, gather all ingredients and prepare by grating the onion and pressing the garlic, then preheat your oven to 375°F.

2-In a large bowl, combine the ground beef, ground pork, half of the grated Parmesan, heavy cream, egg, grated onion, pressed garlic, Italian seasoning, black pepper, and salt; mix gently until just combined to keep the meatballs tender.

3-Shape the mixture into evenly sized balls, about 1 to 1.5 inches in diameter, for consistent cooking.

4-Next, heat a skillet with a bit of oil over medium heat and brown the meatballs on all sides for about 5-7 minutes to lock in flavors.

5-Transfer the browned meatballs to a casserole dish, pour the marinara sauce over them, and sprinkle the shredded mozzarella and remaining Parmesan on top for that irresistible cheesy topping.

6-Bake in the preheated oven for 20-25 minutes until the meatballs are fully cooked and the cheese is bubbly and golden.

7-For variations, substitute ingredients based on dietary needs during the mixing step.

8-Once done, let the dish rest for a few minutes before serving to allow the flavors to meld, and garnish with fresh parsley if desired.