Preheat your oven to 375°F (190°C) and grease a 9x13-inch baking dish with olive oil or non-stick spray.

In a large skillet, heat olive oil over medium heat. Add ground beef and cook for 5–7 minutes until browned. Drain excess fat.

Add chopped onion and minced garlic to the skillet. Sauté for another 3–4 minutes until onions are soft.

Spread cooked beef and onion mixture in the baking dish. Layer with thinly sliced potatoes, overlapping slightly.

Season potato layer with salt, pepper, Italian seasoning, and paprika.

Sprinkle shredded cheddar and Parmesan cheese over potatoes. Pour beef broth around edges, optionally drizzle with milk.

Cover with aluminum foil and bake for 30 minutes, then remove foil and bake for an additional 15–20 minutes.

Let it cool for a few minutes, garnish with parsley if desired, and serve.