Clean and clean the mushrooms and, depending on their size, possibly halve them. Peel 2 onions and cut into slices. Wash the meat, dab dry and cut into strips. Heat the lard in a roasting pan, fry the meat vigorously in portions, remove and season with salt and pepper. Add mushrooms and onions to the frying fat and fry for 2-3 minutes, turning. Dust with flour and sauté briefly. Add white wine and cream, bring to the boil, stir in stock. Simmer at low heat for about 10 minutes, put aside
Peel, wash and roughly grate the potatoes. Peel 1 onion and grate it with the potatoes. Lightly squeeze out the grated potatoes. Mix potatoes, potato starch and egg. Season with salt, pepper and nutmeg. Heat the oil in portions in a frying pan. Fry about 16 Rösti out of the potato mixture in portions
Wash the parsley, shake dry, pluck the leaves from the stalks and, except for something to garnish, chop. Add meat to the mushroom sauce and simmer for another 2-3 minutes. Arrange the shredded meat and rösti on a plate. Sprinkle with parsley and garnish