Wash the roast and pat dry. Place the bones on the fat pan of the oven. Cook in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 1 hour. In the meantime, peel and wash the potatoes and carrots. Cut potatoes in half, cut carrots into sticks.
Cook both in boiling salted water for about 12 minutes. Clean and wash spring onions and cut into bite-sized pieces. Clean and wash mushrooms as well. Fry the mushrooms in hot oil while turning for 5 minutes. Season with salt and pepper. Add spring onions, carrots and potatoes also in portions for about 5 minutes in the frying fat. After 45 minutes, deglaze the roast with 1/4 litre water. Wash and chop parsley. Sprinkle over the roast. Melt the sugar in a large pan until golden brown.
After 45 minutes, deglaze the roast with 1/4 litre water. Wash and chop parsley. Sprinkle over the roast. Melt the sugar in a large pan until golden brown. Deglaze with the frying fat and simmer for 2-3 minutes. Swivel the vegetables in it. Arrange on a plate with the roast