Heat a large sauce pan over medium heat, add at splash of olive oil then the garlic. Cook the garlic for about 1 minute. Stir in the tomatoes, basil and season with salt and pepper. Bring sauce to a simmer until sauce is lightly thickened about 30 minutes.
Preheat oven to 400 degrees F.
In a large bowl, combine the ground beef, pork, bread crumbs, onion, ⅓ cup parmesan, garlic, parsley and season with salt and pepper. Gently incorporate all the ingredients. Form the meat into golf ball sizes.
Heat a non stick large skillet over medium heat. Add about ¼ inch olive oil. When the oil is hot, fry the meatballs until golden turning occasionally for about 5 minutes. Continue cooking the rest of the meatballs. Transfer the meatball into a plate.
Spoon a thin layer of the sauce to 9 by 13 inch baking pan. Arrange the meatballs on top of the sauce and sprinkle some parmesan and mozzarella cheese. Top with the rest of the sauce, then the remaining cheese.
Bake for 40 minutes until bubbly. Garnish with chopped parsley and grated parmesan. Serve
Recipe by The Gluten Free at https://www.theglutenfree.com/gluten-free-meatball-parmesan/