Keen eyed foodies will notice what I just did there. Yes, mornay sauce is cheese sauce. This Baked Cauliflower with Mornay Sauce is basically Baked Cauliflower "Mac" n Cheese also known as Cauliflower Cheese. I'm not a fan of the name Cauliflower Cheese, though. Does anyone else picture trying to make cheese out of cauliflower?