Potato gratin with sweet onion

Preheat the oven to 180 ° C.

Cut the onion into thin rings. Heat the butter in a frying pan and fry the onion on low heat for 15 min. Soft and light brown.

Scoop occasionally. Season with pepper and salt. Meanwhile, peel the potatoes and cut into wafer-thin slices.

Grease the oven dishes. Cover the bottoms of the dishes with 1/3 of the potato. Season to taste with salt and divide half of the onion.

Cover with potato, sprinkle with salt, the rest of the onion and cover with potato. Pour the cream over it and sprinkle with the cheese.

Fry the potato gratin in approx. 40 min. Until golden brown and done.