Cut the savoy cabbage into fine strips. Heat the oil in a saucepan and fry the onions until translucent. Add the cut savoy cabbage and the water and cover with a lid. Let cook for 10 minutes on reduced heat. In between, check whether the desired firmness has been achieved. Stir in the quendel and pepper. Put the nut butter on top for 1 minute and stir well. If necessary, season the savoy cabbage with salt.
The amount is enough as a side dish for 2 people and as a main course for 1 person.