Clean the cabbage, wash it, remove the stalk. Cut the cabbage into strips. Peel, wash and chop the carrots. Peel and chop the onions. Peel and wash the potatoes.
Wash the fillets if necessary and dab dry with kitchen paper. Cut a little lengthwise, season with pepper and fill with plums. Wrap fillets with bacon
Fry the fillets in hot oil all around for 6-8 minutes. Brown half of the onions briefly. Pour in approx. 3/8 l water, stir in 1 teaspoon of stock, bring to the boil. Cover the fillets and braise for 15-20 minutes
Heat the fat and sauté the remaining onions. Sauté carrots and savoy cabbage briefly. Season with salt and pepper. Stir in 1/4 l water and 1/2-1 teaspoon broth. Cover and cook for about 20 minutes. Cover the potatoes and cook in salted water for about 20 minutes.
Keep the fillets warm. Lightly thicken the roast stock with sauce thickener. Season to taste the sauce and savoy cabbage
Just before serving, cut the fillets into slices. Arrange on the savoy cabbage and garnish with marjoram. Add the sauce and potatoes