The world's greatest mac and cheese

Well, this is now official, the macaroni and cheese my wife found out in a Rose Elliot book is really the greatest macaroni and cheese in the whole world. Well, I am exaggerating, what I mean is that we made it during the Christmas holidays to my family and they loved it. It was strange, because we didn't do it so well on that occasion. But it impressed my parents enough to try it for themselves. We had given them the recipe, which you can find on this post. My mum used Cracker Barrel cheese on top. Anyway, for no better reason that it now crossed the Atlantic and it was a roaring success in the family, I am plugging it again, with a picture my father took of their version. This is, in my opinion, the world's greatest mac and cheese.