The finished recipe. Gluten-Free Penne with Turkey MeatballsIngredients 1 to 6. 260g Turkey, ground. 80g Onions. 120g Tomato sauce, plain. 2 cloves Garlic. 2 Olives. 1 tbsp Olive oilIngredients 7 to 7. 80g (16g protein/100g) Gluten-free penneStep 1. Finely dice the onion and garlic. Mix the turkey with half the diced onion and garlic, season, and shape into meatballs.Step 2. Heat the olive oil in a pan and brown the meatballs on all sides, then add the remaining onion and garlic and cook until softened.Step 3. Pour in the tomato sauce, add the olives, and simmer until the meatballs are cooked through and the sauce has thickened slightly.Step 4. Meanwhile, cook the gluten-free penne according to package instructions, drain, and toss through the sauce with the meatballs.