This easy Breakfast Sausage Casserole features layers of cubed white bread, savory browned sage sausage, and sharp Cheddar cheese, all bound together with a rich egg and half-and-half custard. Prepared the day before, it requires an overnight chill, making it a perfect make-ahead dish for brunches or holiday breakfasts. Baked until golden and set, it's a hearty and flavorful morning meal.
Ensure sausage is thoroughly drained to prevent a greasy casserole; a paper towel-lined plate works well. The overnight chilling is crucial for the bread to fully absorb the custard, resulting in a cohesive, non-soggy texture and allowing flavors to meld deeply. Do not overmix the eggs, as this can make the casserole rubbery. For an extra golden and slightly crispy top, you can remove the foil for the last 10-15 minutes of baking. Consider using a good quality, slightly stale bread or even brioche for added richness. A pinch of nutmeg or a dash of hot sauce in the egg mixture can add complexity.