To make this Shepherd’s Pie Soup Recipe gluten free, use certified gluten-free beef broth and gluten-free Worcestershire sauce, as some brands may contain gluten-based additives. Confirm that the tomato paste, sour cream, butter, heavy cream, cheddar cheese, frozen peas, dried herbs, and seasonings are gluten free and processed without cross-contamination. Potatoes, ground beef, carrots, onion, and garlic are naturally gluten free, but all packaged ingredients should be checked carefully.