Cover the potatoes with their skins and cook for about 20 minutes. Then drain, rinse and peel. Leave to cool.
Finely dice the bacon. Cut sausage into slices. Clean the mushrooms and wash if necessary. Peel and chop onion. Clean, wash and cut leek into rings. Wash parsley, shake dry and chop.
Fry the bacon in a large pan without fat until crispy, remove. Fry the sausage in the bacon fat and take it out. Fry the mushrooms in the frying fat all around. Season with salt and pepper. Add onion and leek and fry.
Take everything out.
Cut the potatoes into slices. Heat the clarified butter in the pan. Fry the potatoes in it, possibly in portions, turning them golden brown. Add bacon, sausage and mushroom mixture again and heat up.
Season everything with salt and pepper.
Heat butter in a coated pan. Fry the eggs in it to make fried eggs. Season with salt and pepper. Arrange fried potatoes with fried eggs and sprinkle with parsley. Add sour cream if necessary.