Cooking Goddess
Chef Extraordinaire
...I've made versions with meat mixed in with the pasta and sauce. One of the kid's favorites was with chunks of smoked kielbasa and green beans. Crumbled Italian hot sausage works well, too.
The sausage sounds good Steve. Do you use Italian cheeses with it too? I could see this with some mozz and parm/romano.
Whenever we have leftover ham AND I make mac & cheese it seems like the ham likes to climb into the dish with the mac...