Creamy Macaroni 'n' Cheese

In a large microwave-safe bowl, cover and microwave onion on high for 1 minute or until tender; drain.

Add the macaroni, cheddar cheese and parsley; set aside.

In a blender, combine the milk, cottage cheese, mustard, salt and pepper; cover and process until smooth. Stir into macaroni mixture.

Pour into a 1-1/2-qt. baking dish coated with cooking spray.

Bake, uncovered, at 350° for 20-25 minutes or until lightly browned.