This hearty casserole is the ultimate make-ahead breakfast or brunch centerpiece. It layers savory sausage, golden hash browns, fluffy eggs, and melty cheese for a comforting, satisfying meal that feeds a crowd with minimal fuss.
Thaw hash browns completely to avoid a watery casserole. Letting the baked casserole rest is crucial for clean slices. For make-ahead, assemble the night before, cover, and refrigerate, then bake as directed (may need a few extra minutes).