Firstly, take a cooker, add oil and heat it.
Into it, add sliced onions, salt to taste, mix well and saute the onions until they turn slight golden color.
Once the onions start changing their color, add ginger garlic paste, saute the ginger garlic paste for few minutes to get rid of the raw smell.
Add the mutton pieces, roast them well.
Keep mixing and stirring for few minutes on medium to low flame until the mutton is roasted well and changes its color completely.
Add turmeric powder and roast it for few more minutes and keep stirring.
Add red chilli powder, mix well.
Cook the mutton for 4-5 minutes until oil leaves the sides on low flame.
Give a mix, cook again for 2-3 minutes.
Now add the tomato puree into the mutton, mix it well.
Cook the puree for about 10 minutes on low flame until oil starts leaving the sides.
Keep stirring in between.
The puree has to be cooked well and not leave any raw smell.
Add 3 cups water, mix well.
Add salt if required.
Pressure cook the mutton until it gets tenderized or give about 3-4 whistles on low flame.
Switch off the flame.
Reduce the steam completely.
Open the cooker lid.
Add chopped coriander leaves, crushed kasoori methi.
Add garam masala powder, kali mirch powder.
Mix well.
Switch on the flame.
Cook the mutton curry for 5 minutes on low flame.
Switch off the flame.
Serve the mutton curry with rice or roti.