Heat the oil in a sufuria, put cumin,and immediately put the boiled potatoes and a glass of water.put the chick peas and the raw mango and let it boil.add In the salt and turmeric powder.mix and let it cook for few minutes. Now put the gram flour in a glass of water and stir well.pour this gradually while mixing the peas and potato mixture. After 2 minutes,switch off. Serve with crisps or chevro (Indian favourite snack)