
Overnight Breakfast Casserole is the best make-ahead breakfast for holidays. Sausage, eggs, cheese, dry mustard, and herbs make this so delicious!
Cook and crumble sausage until no longer pink. Transfer to a paper-towel lined plate to drain of excess grease.
For the custard, in a large bowl, whisk together eggs, salt, black pepper, cayenne pepper, ground mustard, dried sage, dried chives and half-and half until well combined.
To a buttered 13"x9" baking dish, layer the bread, sausage, then the cheeses. Pour the custard over the top. Ensure all of the bread pieces are submerged. Cover with plastic wrap or a lid and refrigerate overnight.
Next day, while the oven preheats oven to 350˚F, allow the casserole to sit at room-temperature. Bake 45-50 minutes or until light golden brown and cooked through. Rest 5 minutes before serving.