This dish has everything to love about a traditional bagel breakfast sandwich, but it's all baked into a creamy, cheesy casserole that can be made the night before.
This overnight croissant casserole makes for the perfect weekend breakfast. Toasted croissants are layered with a creamy filling of caramelized onions, bacon, and herbs, then soaked in a mustardy custard for 24 hours before baking.