01 -
Turn your oven to 350°F (175°C) to get it ready.
02 -
Using a big skillet, cook the ground beef over medium to high heat for 5–7 minutes until it's crumbly and browned. Pour off the grease, then set it aside.
03 -
Grab a mixing bowl and stir together the chopped onion, cream of mushroom soup, milk, salt, and a bit of pepper until blended.
04 -
In a 2-quart dish for baking, layer the sliced potatoes, browned meat, and soup mixture one after the other.
05 -
Put the dish in the oven. Cook for 60 to 90 minutes until those potato slices are nice and soft.
06 -
Sprinkle the Cheddar cheese all over the top and pop it back in the oven. Heat it until the cheese starts bubbling and melts.