Yes! You can freeze this casserole before baking. Just cover it tightly before freezing. To cook from frozen: Remove the casserole from the freezer and put it in the refrigerator the night before baking. Preheat the oven to 350 degrees. Cover the dish with foil and bake for 45 minutes, then remove the foil and bake an additional 20-30 minutes or until the eggs are set.