Can I make this recipe the night before?
Yes. Assemble the puff pastry, filling, and toppings in a baking dish, cover with plastic wrap, and refrigerate up to 12 hours. Add 5–10 minutes to bake time if baking from cold.
How do I know when the puff pastry is done baking?
The pastry should be deep golden brown and puffed up. The filling should be set and no longer jiggle in the center when gently shaken.
Can I use store-bought sausage gravy instead of making it?
Yes. Use about 2 cups of prepared sausage gravy. Omit the flour, milk, sausage, and black pepper, then proceed with adding hash browns, egg, and cheese.
Can I substitute the cheddar cheese?
Yes. Gruyere, Swiss, or a blend of mozzarella and parmesan work well. Use the same quantity.
Does this recipe freeze well?
Yes. Bake completely, cool, wrap tightly, and freeze up to 3 months. Thaw overnight in the refrigerator and reheat at 350°F for 20–25 minutes until warmed through.