To enjoy a gluten-free version of this Classic Beef Liver with Sauteed Onions. You'll want to ensure all your ingredients. Are certified gluten-free. Especially if using pre-packaged items. Most ingredients in this recipe. Naturally do not contain gluten. But it's important. To check items like buttermilk. For any additives. That might include gluten. By selecting pure, straightforward ingredients. You can savor this nourishing, comforting meal. Without worry.