Brioche French Toast Casserole

"The ideal main course for breakfast or brunch is made with lightly sweet brioche bread. This french toast casserole can be assembled the night before or the morning you plan to serve it. Many times a breakfast casserole is great because it can be assembled the night before and popped in the oven the next morning. If you're busy the night before, this brioche french toast casserole is just as good if you assemble it in the morning before it’s baked. Give it just a little time for the bread to soak up the egg mixture, but about 45 minutes should be plenty."