01 -
Set your oven to 350°F (175°C) and let it heat up.
02 -
Break apart the ground beef in a big pan on medium-high. Keep cooking for 5-7 minutes or so until no pink is left. Drain the extra grease and put it aside.
03 -
In a medium-sized bowl, stir together the mushroom soup, milk, chopped onions, and season with a little salt and pepper.
04 -
In a 2-quart baking pan, alternate between slices of potato, the soup mixture, and the cooked beef until you've made all the layers.
05 -
Pop the dish into the heated oven and let it bake for roughly 1 to 1 1/2 hours until the potatoes get soft and tender.
06 -
Scatter shredded cheese all over the top. Return to the oven and bake a few minutes more, just long enough to melt the cheese and make it gooey and bubbly.