Three types of ground meat, aged cheese, and fresh herbs converge for a meatball that's light yet super flavorful, especially when paired with fresh tomato sauce.
Make the sauce: Combine tomatoes, garlic, oil, 1 teaspoon salt, and the red-pepper flakes. Let stand for 30 minutes.
Make the meatballs: Combine meats, garlic, breadcrumbs, cheese, parsley, eggs, 2 1/2 teaspoons salt, and 1/2 teaspoon pepper in a bowl; mix together using 2 forks until just combined. Roll into 1-inch balls; transfer to a baking sheet.
Heat 2 tablespoons oil in a large, heavy-bottomed skillet over medium heat. Working in batches and adding more oil as necessary, cook meatballs until browned on all sides and cooked through, 6 to 8 minutes. Add basil to tomato sauce. Serve meatballs warm, topped with sauce. Garnish with parsley.