Pour some oil in the pressure cooker. Add ginger garlic paste and tomatoes in the cooker. Fry them until the tomatoes become a little mushy. Now, add the sliced potatoes, mutton pieces and methi leaves to the cooker and sauté them for a few minutes. Then add chilli powder, garam masala, coriander powder and mix everything well. Once the spices become fragrant, add the onion and coconut paste. Fry them until the raw smell leaves the cooker. Lastly, add the mutton broth to the cooker and close the lid. Let it cook for a few minutes, preferably until one whistle.