Preheat oven to 400°F
In a large bowl, combine ground beef and ground Italian sausage meat. If using links, remove the casings from the Italian sausage before adding to the bowl.
Peel 2 cloves of garlic, and mince finely (or use a garlic press to mince). Add to the bowl. Add bread crumbs, parmesan cheese, eggs, milk, and seasonings to the bowl. Combine all ingredients thoroughly. Set aside.
Line with aluminum foil, and lightly oil two 9”x13” baking dishes (or 2 large cookie sheets).
Form golf-ball sized balls with the meat mixture, and place them within your baking dishes (or cookie sheets).
Place the baking dishes (or cookie sheets) in the oven. Bake meatballs for 25 minutes, or until fully cooked. Meatballs are done when the internal temperature reaches 160°F at the thickest part of the meat.