This Make-Ahead Sausage  Casserole is the ultimate overnight breakfast solution. Layers of savory browned sausage, crispy hashbrowns, and zesty green chiles are tucked beneath melted cheddar and a rich, creamy egg custard. While it can be baked right away, the real magic happens when it’s assembled the night before—giving the flavors time to blend and the potatoes a chance to soak up the custard, so your morning is completely hassle-free.