heat the pan (kadai )on stove
 add 2-3 tablespoon of oil in  pan (kadai) and heat it up
 add cumin seeds (jeera) and fry it until its color changes to golden brown.
 add chopped green chilies and chopped ginger and cook until its raw flavors goes away
 Add 2 tablespoons of coriander powder
 Add 1/2 teaspoon of red chili powder
 Add 1 teaspoon of garam masala powder.
 Mix it all and cook it until its raw flavour goes away
 Add roughly mashed potatoes in it. Do not mash it in very small pieces
 Mix it well
 Add 1 teaspoon chaat masala powder
 Add 2 teaspoon dry mango powder(amchur)
 Add roasted crushed cumin seeds
 Add raisins (kishmish or dry grapes) in the mixture (completely optional)
 Add salt on top of it and mix it well
 Turn off the gas stove and keep the filling aside to cool