Peel and halve the shallots. Clean and clean the mushrooms and cut into slices. Wash the meat, dab dry and cut into strips. Wash and clean lamb's lettuce, drain well.
Drain the beetroot, cut the slices in half. Put vinegar, salt, pepper and sugar in a bowl. Stir in 3 tablespoons of oil in a thin stream. Season to taste again. Heat 2 tablespoons of oil in a large pan.
Brown the meat in it, take it out and season with salt and pepper. Add mushrooms and shallots to the cooking fat and fry for 2-3 minutes, turning. Sprinkle with 1 tablespoon of flour and sauté briefly. Add white wine and cream, bring to the boil, stir in broth.
Simmer at low heat for about 10 minutes, set aside. In the meantime wash, peel and coarsely grate the potatoes. Mix in egg and 1 tablespoon of flour. Season with salt, pepper and nutmeg. Heat 3 tablespoons of oil in portions in a coated pan.
Pour the potato mixture into the pan, spoon by spoon, and flatten into small Rösti. Fry on medium heat for 1-2 minutes on each side. Remove from the pan and keep warm. Process the rest of the potato mixture in the same way.
Add meat to the mushroom sauce and simmer for another 2-3 minutes. Drizzle the salad with the vinaigrette. Season the shredded meat with salt and pepper. Wash the parsley, dab dry, put something aside for garnishing.
Finely chop the rest. Arrange the shredded meat with hash browns on plates. Sprinkle with parsley and garnish. Serve with salad.