Heat oil and crackle cumin seeds.
When the cumin seeds crackle, saute in the chopped onions for a minute or just until it softens a little.
When the onions turn soft, add chopped green chilies and ginger garlic paste together. Fry them until the raw smell leaves. Take about half a minute.
further, add minced mutton to the pan and mix well with onions. Fry until the mutton turns pale in color. This process is quicker and you need to keep stirring.
Spice powders are added: turmeric powder, chilli powder, coriander powder, garam masala, pepper powder. and salt. Fry the mixture for a minute.
add water, close cook until the mutton is completely cooked. Takes about 15-20 minutes.
While the mutton is cooked, mash and add the potatoes and coriander leaves to the pan. Potatoes have to be cooked with salt and mashed well. add the mashed potatoes and mix well. cook the mixture for about 5 minutes in medium heat until the moisture leaves and it is nicely blended with mutton. keep it aside until it slightly cools down.