Coat A Sauce Pan With Cooking Spray; Place Over Medium Heat Until Hot. Add Onions; Saute 2 Minutes Or Till Tender. Add Margarine; Stir Until Margarine Melts. Add Flour; Cook 1 Minute, Stirring Constantly With A Wire Whisk. Gradually Add 2 Cups Milk And Cook 15 Minutes Or Till Thickened And Bubbly, Stirring Constantly. Remove From Heat; Add Cheddar Cheese Stirring Until Cheese Melts. Stir In 1/4 Cup Milk, Mustard, Pepper And Hot Sauce. Combine Cheese Mixture With Macaroni In A 1 1/2 Quart Baking Dish, Sprayed With Cooking Spray; Stir Well. Combine Bread Crumbs, Parmesan Cheese And Paprika; Sprinkle Over Top Of Steak. Protein 7.6 / Fat 4.2 / Carbohydrate 16.3 / Cholesterol 10 Iron 0.6 / Sodium 165 / Calcium 190