Originally Posted by waaza
Sauted chicken topped with cheese and potato does not sound like casserole ingredients.
I would definitely consider this a casserole. The potatoes are au gratin, similar to Dauphinois. One can get a crispy topping even at 350 for 30 - 45 minutes. It just has to be the right topping.
I think your breadcrumbs were too fine and no butter was used AND, most importantly, cheese isn't going to form a crust. Everyone's suggestion of the Ritz crackers and butter is probably the way to go. Potato chip topping is also VERY good!!! So is a topping of Pepperidge Farm stuffing but you already have the potatoes.