What do you get when you combine stuffing mix, chicken, and zucchini and wrap it all up in a creamy base? One irresistible casserole, thats what. Our chicken zucchini casserole is one of those dinners thats super easy to throw together yet always satisfies (and its a great use for leftover rotisserie chicken or summers squash bounty). Its comforting and filling, but the zucchini keeps it from feeling too heavy and the savory combination of stuffing seasoning and our from-scratch cream soup substitute is the stuff casserole dreams are made of.