Heat oil in a pan and fry the onions till they turn transparent. Add fenugreek, cummin, aniseed and onion seeds and fry for a minute. Add turmeric and chillies. Stir in cauliflower, cabbage and sugar (artificial sweetner). Cover and cook on a low flame for 5 to 7 minutes. Add pepper strips and sprinkle vinegar on top. Cook for a further 5 minutes till the vegetables are tender.