Preheat oven to 190°C and lightly grease a casserole dish
Heat olive oil in a pan, sauté onion, then add ground beef and cook until browned
Stir in garlic powder, paprika, thyme, salt, pepper, and tomato sauce
Layer sliced potatoes in the dish, top with beef mixture, and repeat
Pour broth over casserole, cover, and bake until potatoes are tender
Sprinkle cheese on top and bake uncovered until melted and golden
