To enjoy a gluten-free rendition of this Bowtie Macaroni Crockpot Casserole you can use gluten free pasta made from rice, quinoa or corn. Just make sure that all the seasonings and cheeses you utilize are certified gluten free. Also choose a tomato sauce and stewed tomatoes that don't have any additives. By making these substitutions you can indulge in the wonderful flavors while still following your gluten free lifestyle. So go ahead. Relish every bite knowing that you're having a gluten free dining experience.