01 -
Set the oven temperature to 190°C and allow it to fully preheat.
02 -
In a large skillet over medium heat, brown the breakfast sausage until fully cooked. Drain excess fat and set aside to cool slightly.
03 -
Whisk together eggs, heavy cream, milk, salt, black pepper, ground mustard, and red pepper flakes in a mixing bowl until homogeneous.
04 -
Place the pie crust into a pie dish, evenly distribute the cooked sausage across the base, then layer shredded Monterey Jack and cheddar cheeses on top.
05 -
Pour the egg and cream mixture over the sausage and cheese layers, ensuring even coverage.
06 -
Bake in the preheated oven for 30 to 35 minutes, until the custard is set and the surface is lightly golden.
07 -
Let the pie rest for several minutes before slicing to facilitate clean portions.