So this recipe is a family favorite. I use buttered challah bread and bacon instead of sausage. Comes out delicious every time. The directions have much to be desired as there is not even a temperature listed. Do people preheat the oven? Do you cook with lid on the casserole dish or off? I have an old version of the recipe that isn't alot better but at least says 400 degrees. Please update cooking instructions. Thanks!