01 -
Set oven temperature to 190°C (375°F) and allow to preheat.
02 -
In a skillet, brown the ground beef with finely chopped onion over medium heat until beef is no longer pink. Season with salt, black pepper, garlic powder, and paprika. Drain excess fat if necessary and set the beef mixture aside.
03 -
In a mixing bowl, whisk together cream of mushroom soup and milk until the mixture is smooth and well combined.
04 -
Grease a 23x33 cm (9x13 inch) baking dish. Layer half of the potato slices on the bottom, followed by half of the ground beef mixture. Pour half of the soup mixture evenly over the beef. Sprinkle with approximately 55g shredded cheese. Repeat layering with remaining potatoes, beef mixture, soup, and cheese.
05 -
Cover the baking dish with foil and bake for 45 minutes. Remove the foil and continue baking for an additional 15 minutes, or until potatoes are fork-tender and cheese is golden and bubbling.
06 -
Allow the casserole to rest for 5–10 minutes before serving. Garnish with freshly chopped parsley if desired and serve warm.