A cozy, make-ahead breakfast casserole featuring savory sausage, melty cheese, and fluffy eggs layered with artisan bread. Perfect for busy mornings or lazy weekends, this dish is comforting, easy, and crowd-pleasing.
Use room temperature eggs for better custard texture. Press bread lightly into egg mixture before refrigerating to avoid mushiness. Caramelizing onions adds sweetness and depth. If edges brown too fast, cover loosely with foil during last 10-15 minutes of baking. Can be made ahead and refrigerated up to 24 hours before baking.
Keywords: breakfast casserole, make-ahead breakfast, sausage casserole, easy breakfast, cozy breakfast, loaded casserole, savory breakfast