Soak the porcini in 300 ml water. In the meantime clean and wash the mushrooms. Cut the mushrooms into slices. Heat the fat. Fry the mushrooms and chanterelles for about 5 minutes, season with salt and pepper.
Add porcini mushrooms with soaking water and cream, boil down for 5 minutes. Add sauce thickener, bring to the boil briefly and season to taste again. For the Rösti, peel, wash and roughly grate the potatoes. Peel and chop the onions.
Mix potatoes, onions and egg. Season with salt and pepper. Fry in portions in hot oil at medium heat on each side for about 3 minutes. Serve rösti and creamed mushrooms, sprinkled with chives, and served with turkey breast.