1Heat oven to 375. Spray a 2-quart casserole dish w/ cooking spray. In bowl, stir milk and soup until smooth, add to casserole dish. Stir in ham, mushrooms, macaroni and onions. Bake, covered 40 min or until macaroni is tender. Sprinkle w/ cheese. Bake, uncovered until cheese is melted, about 10 min.