This is a very rich version of a chicken casserole. It's great way to use leftovers and not have dinner TASTE like you're having leftovers! It's also a great party dish AND it's very flexible. You can substitute asparagus for the broccoli, turkey for the chicken, add a layer of sauted mushrooms or substitute the cream of chicken for cream of mushroom. My family is not "BIG" on casseroles, but they love this version of the traditional favorite.