Forgot to grease ceramic pan for strata
If you're careful not to overcook it, it'll likely be fine. Eggy bready things will indeed eventually stick pretty badly, but if you pull it out when the eggs are just barely set all the way through, it won't have time to truly stick or burn on the bottom yet. I might bake it pretty high in the oven so that the top will be more likely to be well-browned in time.