This chicken tetrazzini is a comforting creamy low fat version of lusciousness! A cheesy pasta bake loaded with juicy chicken and plump mushrooms. When you bake this pasta casserole, some of the sauce bakes into the pasta, the flavors marry and something wonderful happens. You’ll know what I mean when you try it. Ridiculously good, easy to prepare, kid friendly, reheats well and freezer safe. P.S. you can further simplify this by using rotisserie chicken – You’re welcome ‘ma friends in advance!