01 -
Preheat oven to 175°C (350°F) if preparing the casserole for immediate baking.
02 -
In a large frying pan, cook sausage until browned completely. Drain excess fat and set aside.
03 -
Using the same frying pan, lightly brown the hash browns (working in batches if necessary), then transfer to a greased 23x33 cm (9x13 inch) casserole dish.
04 -
Top hash browns with the cooked sausage and sprinkle cheese evenly over the top.
05 -
In a medium bowl, whisk together eggs, milk, onion powder, garlic powder, salt, and pepper until well combined. Pour this mixture over the layered ingredients in the casserole dish.
06 -
Cover the casserole dish with aluminum foil and refrigerate overnight.
07 -
Remove from refrigerator, uncover, and bake at 175°C (350°F) for 40 minutes, or until cheese is bubbling and beginning to brown on top.