Make a white sauce with butter, cornstarch and milk. Add 8 oz. cheese. Stir until melted. In 1 1/2 qt. casserole, combine macaroni and cheese sauce. Top with remaining 2 oz. cheese. Bake at 350 for 25 minutes.
Although spelt is actually a type of wheat flour, most people with wheat allergies can digest spelt with no problem. Obviously, you should not eat spelt if it is a problem for you.