For the gratin, peel, wash, thinly slice or slice the potatoes. Layer the potatoes in four small greased gratin dishes (each containing approx. 200 ml) or in a large gratin dish.
150 g cream with salt, pepper and nutmeg strongly season, pour over. Cook in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer) for approx. 45 minutes.
For the vegetables clean and wash the beans. Peel and chop the onion. Heat 2 tablespoons of butter in a saucepan. Fry the onion until transparent. 1⁄8 l Pour on salt water, bring to the boil. Add the beans, cover and stew for about 12 minutes.
For the roulades, clean and wash the spring onions and cut them into pieces about 8 cm long. Cut the cheese into small pieces. Dab steaks dry, season with salt and pepper. Spread cheese and spring onions on top, roll up and pin with wooden skewers.
Heat the oil in a large pan with a lid. Fry the roulades in it in 2 portions all around for about 3 minutes. Put all the rolls back into the pan. Season with salt and pepper. Deglaze roulades with white wine, 150 ml water and 50 g cream.
Bring to the boil. Cover and stew for about 5 minutes. Season sauce with salt and pepper. Arrange everything.