Peel and roughly grate the potatoes.

Briefly squeeze out excess liquid from the rasp with your hands.

Peel the onion and cut into fine cubes.

Heat the butter in a pan and sweat the onion until translucent.

Add ham and fry, then add the mix to the potatoes.

Mix yoghurt, mustard and cheese together in a bowl, season with salt, pepper and freshly grated nutmeg and add.

Put the rösti mix in a dripping pan.

Bake the rösti casserole at 200 ° for approx. 50 minutes.

We cover the surface too brown, if necessary with aluminum foil.

Take out of the oven, cut into pieces and serve.