Remove the outer cabbage leaves, cut out the stalk. Quarter cabbage, cut into pieces, wash and drain. Peel and wash carrots and potatoes. Clean the leek. Cut prepared vegetables into bite-sized pieces.
Heat the lard. Fry the white cabbage for about 10 minutes, turning occasionally. Add remaining vegetables and lentils. Season with salt and pepper. Deglaze with tomato juice and stock. Let it boil up briefly.
Cover and cook for about 20 minutes. Wash and chop the parsley. Grate parmesan. Season stew again with salt, pepper and vinegar. Serve sprinkled with parsley. Add the parmesan.