Heat oil in a pressure cooker. Fry the onions till golden brown.
Add the mutton and curry leaves and fry for a few more minutes. Ensure that the onion does not become too brown.
Add the salt and the ground paste and fry for a couple of minutes till the raw smell goes.
Add the masala powders along with the potatoes and fry for a couple of minutes.
Pour around 1 cup of water, not more than that.
Close the pressure cooker and cook till the mutton is done. Allow the pressure to go by itself.
Open the pressure cooker, put the curry on simmer and add the grounded coconut to the curry. Cook for 3 minutes. Serve hot with rice or chappathi.