Sort the kale and remove thick veins. Wash thoroughly. Steam in plenty of boiling salted water in portions for about 3 minutes. Drain and chop roughly
Peel and chop the onions. Fry in hot clarified butter. Add kale and pour in approx. 1 1/2 l water. Bring to the boil and stir in the stock. Cover and cook for 1-1 1/2 hours
Peel, wash and chop the potatoes and carrots. Add both with sausage and mustard seeds to the kale approx. 30 minutes before the end of the cooking time and cook along. If necessary, remove the sausage, cut into slices and add to the kale again. Season to taste with salt and pepper
If you like kale creamy, you can thicken it with 1-2 tablespoons of oat flakes or a raw grated potato