Filling:
Heat the oil in a frying pan on medium-high heat. Test the heat by adding one cumin seed to the oil; if it cracks right away oil is ready.
Add cumin seeds as cumin seeds crack, add green chilies, coriander powder, and stir for few seconds.
Next, add green peas and turn heat to medium and stir until tender.
Add the potatoes and stir-fry for about 4 minutes. Stir in garam masala and amchur. Add more salt or amchur according to taste.
Let the filling cool to room temperature.
will be too soft and not crispy.