Wash and quarter the cabbage, remove the stalk and cut into strips. Peel the potato and cut into large cubes. Bring the soup to the boil in a large pan, add the cabbage strips and simmer for approx. 30 minutes. Add the potatoes to the stew after approx. 10 minutes of cooking time and simmer. Season with salt and pepper.
Dice the onion. Heat the oil in a large non-stick pan and sauté the diced onion. Add the mince and fry. Then stir into the stew and season with salt and pepper.