Absolute killer casserole that borders on addictive. Other similar recipes are posted, but the magic ingredient here is the croutons! I substitue olive oil for half of the butter. Have made this on many occasions and have found that at least 3/4 C chicken broth is necessary to achieve the right moisture. This freezes wonderfully; just take the leftovers out of the casserole as intact (in a single layer) as possible and lay it on half of a folded sheet of foil about 18" long. Make a pouch out of the remainder and freeze. When reheating, cut slits in the top of the foil and the croutons will retain most of their crunch. YUMMY!