8 oz. (2 cups) dry whole wheat macaroni
2 c. low-fat milk
1 1/2 Tbsp. cornstarch
3/4 tsp. salt
1/4 tsp. pepper
1/2 tsp. dry mustard or 1 Tbsp. Dijon mustard
1/4 tsp. paprika
6 oz. (1 1/2 c.) grated, sharp cheddar cheese
6 oz. (1 1/2 c.) grated Natural American cheese