Soak plums in wine overnight. Then drain and collect the wine. Chop the plums into small pieces, up to about 8 for garnishing. Coarsely chop the nuts and mix with the plums
Wash duck breasts, pat dry. Cut one pocket in each. Fill them with the plum mixture and pin them up. Season meat
Heat the oil. Sauté duck breasts first on the skin side, then on the meat side. Fry over medium heat for 20-25 minutes. Turn from time to time
Keep duck breasts warm. Drain frying fat, except for a little bit, carefully. Add stock and red wine and bring to the boil. Bind lightly with sauce thickener and season to taste. Cut open duck breasts. Garnish with remaining plums and possibly parsley. Broccoli and croquettes taste good with it