Preheat your oven to 375°F (190°C) and grease a 9x13-inch baking dish.

In a large skillet, cook the ground beef over medium heat until browned, about 7–10 minutes. Season with salt, pepper, and smoked paprika, then drain excess fat.

Slice the potatoes thinly and layer half in the greased baking dish.

Layer half of the cooked ground beef, onion, and cheddar cheese over the potatoes.

Repeat layering with the remaining ingredients, finalizing with cheddar cheese on top.

Cover with aluminum foil and bake for 50 minutes. Then uncover and bake for an additional 15–20 minutes until the cheese is golden brown.

Let the casserole rest for about 10 minutes before slicing and serving with chopped parsley on top.