Clean, wash and quarter the red cabbage and cut it into fine strips from the stalk. Wash kumquats, drain and cut into slices, removing seeds. Peel and chop onion.
Heat the lard in a large pot. Sauté the onions in it until translucent. Add 3 tablespoons of brown sugar and kumquats. Caramelise over medium heat, stirring occasionally. Add red cabbage, vinegar, orange juice and about 1⁄4 l water.
Season with cinnamon, laurel, cloves, approx. 2 tsp. salt and a little pepper. Bring to the boil, cover and stew for about 1 hour. Stir from time to time. Season red cabbage with salt, vinegar and sugar.