Take curd, ginger garlic paste, chilli powder, turmeric powder, coriander powder, cumin powder in a bowl, mix well and set aside.
Heat ghee in a pressure cooker, add in cinnamon, cloves, peppercorns and black cardamom. Add onions, salt and cook until golden brown.
Add in mutton and mix well until it is seared. Add in the potatoes. Mix well.
Add in curd mix and stir well till the colour darkens. Add some water.
Add some water and mix well. Cover and pressure cook for 3 whistles. Then simmer the flame and cook for 15 mins. Turn off the heat and let it stand till the pressure is released.