Wash the raisins, drain and sprinkle with 2-3 tablespoons of wine. Peel and chop the onions. Roast the pine nuts in a pan without fat and take them out. Wash pork fillets, dab dry and cut in half crosswise.
Heat 1-2 tablespoons of oil in a frying pan, sauté diced onions in it until translucent and remove. Heat 1 tablespoon of oil in a frying pan and fry the fillets on all sides. Season with salt and pepper and remove.
Clean and wash the savoy cabbage and blanch 8 outer leaves in boiling salted water for about 3 minutes. Quench cold and drain. Cut cabbage ribs flat. Cut remaining cabbage into strips.
Heat the rest of the oil in the pan and sauté the savoy cabbage for about 5 minutes while turning. Season with salt and pepper and deglaze with stock and the remaining wine. Put into an ovenproof dish. Drain raisins and mix with pine nuts and onions.
Lay 2 cabbage leaves overlapping on top of each other. Spread the raisin mixture, except for 1 tablespoon, over the cabbage leaves and spread a little. Place 1 fillet piece on each of 2 cabbage leaves, roll up and pin with wooden skewers.
Place the parcels on the cabbage strips and sprinkle with the remaining raisin mixture. Cover and braise in the preheated oven (electric cooker: 200°C / gas: level 3) for about 60 minutes.