1 can (10 1/2 oz.) condensed cream of mushroom soup
1/2 c. milk
1/2 tsp. prepared mustard
Dash of pepper
3 c. cooked elbow macaroni
2 c. shredded cheese
1 c. French fried onion rings

In 1 1/2-qt. casserole blend soup, milk, mustard, and pepper. Stir in macaroni and 1 1/2 c. cheese. Bake at 350 degrees for 20 minutes. Top with onions and remaining cheese and bake 10 minutes more.