To make a Crunchy Chicken Casserole without gluten you can use gluten-free egg noodles or a pasta option made from rice, quinoa or chickpeas. Make sure the cream of chicken soup you select is certified as gluten-free. Additionally double check if the French Fried Onions are gluten free or think about creating your own using breadcrumbs that are free, from gluten. By making these substitutions you can savor the delightful flavors and textures found in the original recipe while accommodating a gluten free diet. Enjoy your meal!