This is a very easy and delicious breakfast casserole. The recipe originates with the "Pioneer Woman". I have made it many times and it is a real "crowd pleaser". You can assemble it the night before and bake it in the morning but I have baked it immediately after assembling it and it worked out well. I have also baked it and froze it and then thawed and reheated it without a problem. I usually buy the spicy breakfast sausage to add a little spice. I have also made two smaller portions, one to eat and one in the freezer. Try this casserole, you won't be disappointed!