Caramelized Onion Breakfast Casserole
This make-ahead brunch casserole is flavor-packed with fresh broccoli, gooey cheese, and sweet caramelized onions.
Prepare as directed. Cover and refrigerate up to 24 hours. To serve, preheat oven to 325°F. Bake casserole, covered, for 20 minutes. Uncover and bake 20 to 30 minutes more or until a knife inserted near center comes out clean. Let stand 10 minutes before serving.