How to Make It
Prepare the meatballs: Combine turkey, sausage, panko, parsley, pecorino, Italian seasoning, salt, and grated garlic in a large bowl; form into 18 (2-inch) meatballs.
Heat a large nonstick skillet over medium; coat skillet with cooking spray. Working in batches, add meatballs to skillet, and cook until browned on all sides, about 2 minutes per side. Remove meatballs from skillet, and set aside.
Prepare the sauce: Reduce heat to medium-low. Add oil and smashed garlic to skillet; cook until garlic is golden, 1 to 2 minutes. Add tomatoes and crushed red pepper; return meatballs to skillet. Cover and simmer until cooked through, about 3 minutes. Uncover; add mozzarella pieces. Cover and cook until cheese is melted, about 2 minutes. If your skillet doesn’t have a lid, you can put it under the broiler until cheese is melted, 2 to 3 minutes. Garnish with additional chopped parsley.