Wash your cabbage, tomato and green chili well. Chop the cabbage into small pieces, chop the onion into rough pieces, Cut the tomato into cubes and slice your green chili.
In a pan add the oil, heat up a bit and fry your onions translucent. Then add the tomato and chili pieces and continue to stir fry for 1-2 minutes.
Then season with salt, pepper and turmeric. Stir fry for another minute. Then directly add the chopped cabbage and continue to stir fry for a minute.
Cut your potato into small cubes and add to the pan with the cabbage, together with the 3 Tablespoons water. Don't add more water because the cabbage will loose water while it's sweating in the pan.
Let cook the whole content while stirring occasionally, until the cabbage is soft but a bit firm to the bite, that means the cabbage bhaji should have some texture too.
Garnish with freshly scraped coconut and serve hot as side dish with coconut curries (see suggestions further up in post)