8 oz. cooked macaroni (ready cut long noodles)
1 c. Kraft mayonnaise
1 small can mushrooms, drained
1 onion, grated
1 lb. sharp Cheddar cheese, grated
1 jar pimento
1 can cream of mushroom soup

Combine all ingredients and bake, covered, for 45 minutes, then uncovered for 10 minutes at 350°F.