Hey, fellow gluten-free food enthusiasts! If you're looking to make this recipe without gluten simply use gluten-free stuffing mix and jumbo shells. Make sure to check for gluten-free certified options at your nearby grocery store so that everyone can relish a safe and delightful meal. With this substitution you can still indulge in all the comforting flavors of our Chicken. Stuffing Stuffed Shells without any concerns, about gluten.