Heat the instant pot in SAUTE mode.Once the pot it hot, add ghee.
To the hot ghee, add onions and whole spices- Cinnamon,Cardamom,Bay Leaf and Cloves.Saute till they turn a little golden brown.Cancel Saute.
Meanwhile, blend together the ground Chilli,Fennel and Dry Ginger.Once it's powdered,Add ½ cup of water and mix it up.
To the cooked onions, add mutton, the chilli, fennel and dry ginger along with water.
Whisk the yogurt very well and add along with saffron strands.
Pressure cook for 35 minutes on HIGH pressure with the pressure valve in SEALING position.
Once the cooking time is up,let the pressure release on its own.Open the pot and give it a mix.
If you want to thicken the gravy, saute it for 3-4 minutes.
if you prefer a really luscious thick gravy, mix 1 tablespoon cornstarch with 3 tablespoon of water.Add it to the instant pot and saute for 3-4 minutes.
Garnish with Cilantro and serve hot.