Soup greens clean or peel, wash and roughly cut. Peel and chop the onion. Wash the roast, dab dry. Salt and pepper. In a large roaster, fry well in 3 tbsp. hot oil, remove.
Brown the vegetables and onion. Put meat on top. Deglaze with wine and 3⁄4 l water. Add stock and spice ingredients, bring to the boil. Cover and cook in a hot oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for about 4 hours.
Cleaning mushrooms, washing them. Possibly halve them. Fry in 6 tablespoons of hot oil until golden brown. Season.
Lift out the roast and cover with aluminium foil. Sieve the braising stock. Add beef stock and demi-glace, bring to the boil. Simmer for about 5 minutes. Stir starch and 100 ml water until smooth. Thicken sauce with it, season to taste.
Cut the roast open and serve with mushrooms and sauce. Goes well with spaetzle (see tip) and leaf salad.