Combine cottage cheese, sour cream, egg, salt, garlic salt and pepper. Add cheddar cheese and Bechamel sauce; mix well. Add macaroni and stir until coated. Transfer to greased 2-2 1/2 qt. baking dish. Sprinkle with paprika if desired. Bake uncovered, at 350°F for 25-30 min. or until heated through. Directions for sauce: Whisk flour and milk in a bowl. Mix in the butter until smooth.