Peel, wash and quarter the potatoes. Peel and quarter 1 apple and remove the core. Cook potatoes and apple in boiling salted water for about 15 minutes. In the meantime roast sunflower seeds in a hot pan. Remove and put aside. Quarter the savoy cabbage, remove the outer leaves and stalk.
Cut the savoy cabbage quarters into thin strips. Peel and finely dice 1 onion. Heat 1 tablespoon of oil in a frying pan and sauté the onion cubes in it. Add the savoy cabbage and stock, cover and stew for about 10 minutes. Heat the rest of the oil in a pan and fry the sausages in it over medium heat for about 8 minutes while turning. Drain the potatoes and let them evaporate. Bring milk to the boil. Coarsely mash potatoes and mix with the milk. Season with salt and nutmeg. Wash remaining apple, dab dry and cut into sticks. Cut remaining onion into rings.
Bring milk to the boil. Coarsely mash potatoes and mix with the milk. Season with salt and nutmeg. Wash remaining apple, dab dry and cut into sticks. Cut remaining onion into rings. Take the sausages out of the pan and keep them warm. Fry the onion rings in the frying fat. Add apple pegs and steam for about 1 minute. Season the savoy cabbage with salt, pepper and nutmeg. Arrange sausages with mashed potatoes and apples and savoy cabbage on plates and spread the onion and apple mixture over them. Sprinkle with sunflower seeds and garnish with remaining marjoram
Take the sausages out of the pan and keep them warm. Fry the onion rings in the frying fat. Add apple pegs and steam for about 1 minute. Season the savoy cabbage with salt, pepper and nutmeg. Arrange sausages with mashed potatoes and apples and savoy cabbage on plates and spread the onion and apple mixture over them. Sprinkle with sunflower seeds and garnish with remaining marjoram