Peel and finely dice 400 g onions. Cut unpeeled apples into quarters, remove seeds and cut into coarse cubes. Heat oil in a large frying pan, fry onions for 5 minutes. Add apples and fry for another 3 minutes. Chop marjoram finely and stir in. Season with salt and pepper, let cool.
Mix veal meat and minced meat with eggs, season with pepper and game spices. Finely dice the dried plums. Mix in the cold apple-onion-vegetables and the dried plums.
Rinse the goose inside and out, dry, season with salt and pepper and fill with the stuffing through the belly opening.
Cut the goose giblets and neck into coarse pieces. Coarsely dice 500 g of unpeeled onions. Coarsely chop goose fat and let it melt in a roasting pan. Brown onions, goose giblets and neck in it. Pour off excess fat, extinguish the mixture with red wine and place the goose in the roasting pan.
Cook in oven preheated to 150 °C top/bottom heat for 3 hours. Remove goose after 3 hours, pour sauce through a sieve. Return goose to roasting pan and cook for another 2 hours, brushing occasionally with rendered fat.
Degrease sauce, bring to a boil and season with salt, pepper, sugar and a few drops of balsamic vinegar. Bind with sauce thickener.
When the cooking time is over, heat the stove to 220 °C and roast the goose for another 10-15 minutes until golden brown.
Serve with the sauce.