Coarsely chop the cashews and roast until golden. Cut the white cabbage into 1 cm wide strips, leaving out the stem. Coarsely crush the coriander. Cut chili pepper lengthwise and remove seeds and white partitions, dice finely. Quarter the onions and cut them into thin strips.
Heat 2/5 of the oil moderately in a frying pan, add the mustard seeds, cover and roast until the mustard seeds pop (takes only a few seconds!). Then add onions and water (1), roast the onion until light yellow. Then add turmeric, cumin, coriander, ginger and chili pepper and fry briefly. Stir in white cabbage, remaining oil, salt, paradeis pulp and water (2). Steam the vegetables for fifteen minutes until al dente.
Add lemon peel, juice of one lemon and cashew nuts, season with a little cayenne pepper and sprinkle with parsley.
Serve with mashed potatoes or long-grain rice.