- Take a pan and add oil,then add onion, corinader and saute well. Then add boiled and mashed potato. Then add turmeric,red chilli powder,salt and mix well. And cook for 5 minutes. Take a pan and oil to it then take a bread and place some prepared mixture on it and add grated cheese and place another a bread on it. Then slightly press. And cook on both the sides. Cut diagonally and serve.