Glorious Macaroni - cooking recipe

Ingredients

1 (8 oz.) pkg. macaroni (shells or twists work best)
2 c. sharp Cheddar cheese, shredded (8 oz.)
1/4 c. chopped onion
1 (2 oz.) jar diced pimento, drained
1 (2 1/2 oz.) jar sliced mushrooms, drained
1 Tbsp. margarine
1 can cream of mushroom soup

Preparation

Cook macaroni and drain.
Saute onion, pimento and mushrooms in butter.
Combine macaroni, onion mixture and remaining ingredients; mix well.
Spoon into a lightly greased 2-quart casserole.
Bake at 350\u00b0 for 30 minutes.