Preheat the oven to 200°C .
In a pan, fry the potatoes with a little oil until they begin to brown.
Add the onion and sausage slices and let them cook for a few minutes.
Transfer everything to a baking dish. Season with salt, pepper, and garlic powder.
Sprinkle generously with grated cheese.
Bake for 20 to 25 minutes , until the cheese is melted and golden brown.
