01 -
Preheat your oven to 375°F (190°C) and grease a 9×13-inch baking dish.
02 -
In a large mixing bowl, combine the cream soup, sour cream, and half of the shredded cheddar cheese. Add salt and pepper to taste. Stir in the sliced potatoes, sausage, and diced onion. Mix until everything is evenly coated in the creamy mixture.
03 -
Transfer the mixture to the prepared baking dish and spread it out into an even layer.
04 -
Sprinkle the remaining cheddar cheese evenly over the top.
05 -
Cover the dish with foil and bake for 30 minutes.
06 -
Uncover and bake for an additional 10–15 minutes, until the top is golden and bubbly and the potatoes are tender.
07 -
Allow the bake to rest for 5 minutes before serving. Garnish with chopped parsley, if desired.