Fry the minced meat in a little oil. Chop the onion and fry briefly. Salt and pepper.
Prepare the mashed potatoes according to the instructions. Tip: replace water with milk. Those who prefer to eat home-made mashed potatoes can of course also use home-made ones.
Then put the minced meat and then the mashed potatoes in a baking dish. Cover with the cheese.
Bake the whole thing briefly at 200 ° C until the cheese is lightly browned!