Heat two tea sp cooking oil in a karahi and add coriander seeds, fennel seeds, carrom seeds, asafoetida and sauté for 30 seconds. Now add salt, red chilli powder, garam masala mango powder and mix well. Sauté for 30 seconds. Now add mashed potatoes, coarsely grinded peas and coriander leaves and saute for 1 minutes. Switch off the flame. Filling is ready. Remove it in a plate.