01 -
Cut the potatoes into thin ⅛-inch rounds. Toss them into water to stop them from turning brown.
02 -
Turn your oven to 350°F ahead of time. Give a 9x13-inch baking dish a light spray of cooking oil and keep it aside.
03 -
On medium-high heat, cook up the ground beef with garlic and onion in a large pan. Break the meat into bits while cooking, and pour out any extra grease.
04 -
In a bowl, combine half-and-half, cream of mushroom soup, onion powder, salt, and pepper until it’s all silky smooth.
05 -
After draining the potato slices, arrange ⅓ of them across the dish. Top with ⅓ of the cooked beef, ¾ cup of shredded cheese, and ⅓ of the soup mixture. Repeat the steps for a second layer.
06 -
Layer the remaining potatoes and beef on top, pour over the rest of the soup mixture, and spread out 1½ cups of cheese.
07 -
Cover with foil and bake it for 1 hour and 10 minutes. Then, take the foil off and bake for another 20 minutes. Let it sit for 15 minutes before cutting in.