This is absolutely amazing mac-n-cheese. We now are expected to cook this for all family holidays! I cooked it to recipe the first time, I REALLY do not know how it was supposed to fit into a 9 x 13 although my pan wasn't a deep dish 9 x 13. We get the disposables as you can see in the picture and it fits perfectly. We have made some variations since, added prosciutto and more spice, less salt. It is definitely worth spending the money for the specialty cheeses, hope you all enjoy & thanks for posting the recipe!
I used smoked sausage in mine. It was good but hard to keep lit.