01 -
Set the oven to 200°C. Allow to fully preheat before baking.
02 -
In a large skillet over medium heat, cook the breakfast sausage until browned and crumbled. Retain some rendered fat in the pan, draining only if there is excessive grease.
03 -
Add butter to the browned sausage in the skillet. Sprinkle flour over the mixture and cook, stirring continuously, for 1 to 2 minutes.
04 -
Gradually pour in the milk while whisking constantly. Maintain gentle heat, stirring, until the mixture thickens, approximately 5 to 7 minutes. Season with salt, black pepper, garlic powder, and crushed red pepper flakes as desired. Remove from heat and let cool slightly.
05 -
If needed, gently roll out the puff pastry to fit the pie dish or skillet. Line the baking dish with the pastry, pressing it into the edges.
06 -
Spoon the cooled sausage gravy evenly over the lined pastry. Fold over the edges or, if using a second sheet, place it on top and seal the edges by pressing. Cut small slits in the top layer to allow steam to escape.
07 -
Brush the pastry surface with the beaten egg to ensure an even golden finish.
08 -
Bake in the preheated oven for 25 to 30 minutes until the pastry is puffed and deeply golden.
09 -
Allow the pie to cool for 5 minutes after baking. Slice and serve warm.