Wash the potatoes and cook covered with water for 20 minutes. In the meantime clean and wash the mushrooms. Cut 100 g into slices and fry briefly in 10 g fat, season with salt and pepper.
Cut the cured pork into cubes. Peel the potatoes, cut off a lid and hollow out the potato. Mash the inside and lid of the potatoes (approx. 350 g) with a potato masher. Finely dice 50 g cheese, wash and chop parsley.
Mix the potato mixture with cheese pieces, mushroom slices, sliced pork, crème fraîche, egg and a little parsley. Season with salt and pepper. Stuff the potatoes with it and put them into a greased roasting pan.
Cut the rest of the cheese into slices and place them on the potatoes. Bake in the preheated oven (electric: 225 ° C/ gas: level 4) for 10-15 minutes. In the meantime, quarter the remaining mushrooms and fry them in the remaining fat, season with salt and pepper.
Fold in the remaining parsley. Add mushrooms to the potatoes and serve.