Wash clubs. Onions peel and halve. Cook in plenty of boiling salted water for about 1 hour. Add onions and bay leaves. Skim off the fat layer that develops in between.
In the meantime, boil 3/8 litres of salted water for the potato cookies. Add milk and 1 tablespoon of fat. Stir in the flake puree and let it swell for about 1 minute. Wash and chop the parsley. Knead into the potato mixture with the egg and flour.
Season with salt, pepper and nutmeg. Form into a roll (approx. 4 cm Ø) and chill for approx. 1 hour. In the meantime, wash the Brussels sprouts and cook in boiling salted water for about 20 minutes. Shortly before serving, toss in the remaining hot fat.
Take the legs out of the stock, pepper them and roast them in the preheated oven (electric cooker: 225 ° C/ gas: level 4) for about 15 minutes. In the meantime melt the jelly. After half of the roasting time, spread it on the legs.
In the meantime, boil down 1/2 litre of goose stock and port wine over a high heat for about 5 minutes. Stir cornflour in a little cold water until smooth and thicken the sauce. Let it boil up. Add the cherries.
Season to taste with salt and pepper. Cut the cookie mixture into slices about 1 cm thick and fry in hot oil for about 2 minutes. Serve everything garnished with parsley.