To make this Slow Cooker Savory Salisbury Steak recipe gluten-free. You'll want to make. A few simple swaps. First, replace the Panko breadcrumbs in the beef patties. With a gluten-free breadcrumb option. Which is readily available. In most grocery stores. Also, ensure your brown gravy mix. Is labeled gluten-free. As traditional gravy mixes often contain wheat. As a thickener. By making these changes. You can enjoy this comforting, hearty dish. Without worrying about gluten!