Clean, wash and cut the soup greens into pieces. Peel and halve the onion. Bring the soup greens, onion, bay leaf, cloves, peppercorns, 1/2 teaspoon salt, vinegar, wine and 1/4 litre water to a boil briefly and allow to cool.
Wash the meat, put it in a large freezer bag and add the marinade. Close the bag well and place in a bowl. Place in the refrigerator. Marinate the meat for 2-3 days, turning from time to time.
Soak the baked fruit in approx. 3/8 litres of warm water approx. 2 hours before starting cooking. Dab meat dry, pour stock through a sieve, collect. Drain vegetables and spices well. Heat clarified butter in a roaster and fry the meat all around.
Season with salt and pepper. Add vegetables, braise briefly and deglaze with 1/4 litre of the marinade and soaking water from the baked fruit. Cover and braise in the preheated oven (electric cooker: 175 °C/ gas: level 2) for about 2 hours.
Halfway through cooking, ladle the vegetables from the stock with a skimmer. Add fruit and almond slivers and braise to the end. In the meantime, wash parsley and chives, dab dry and chop them, except for some parsley for garnishing.
Mix 1/2 litre cold water, chopped herbs and dumpling powder with a whisk. Leave to swell for 10 minutes. Form 8 dumplings with moistened hands. Boil up in plenty of boiling salted water.
Leave to stand at low heat for about 20 minutes. Put the roaster on the stove. Put meat on a plate and keep warm in the oven. Thicken the braising stock with sauce thickener, bring to the boil again briefly. Season to taste with salt and pepper.
Arrange roast with some sauce and dumplings on a plate. Serve garnished with remaining parsley. Remaining sauce extra is enough.