1Mix together crushed tomatoes, Parmesan cheese, oregano, basil, garlic powder, and bay leaf for the sauce in a slow cooker.
2Place ground beef, bread crumbs, Parmesan cheese, egg, garlic powder, parsley, Italian seasoning, and pepper for the meatballs in a large bowl. Mix gently, but thoroughly, with your hands until well combined. Form mixture into 1-inch meatballs. Drop into sauce in the slow cooker, stir, and cover.