Soak in the Basmati rice in water for 30 mins. In a cooker add in the mutton along with Curd, turmeric powder, Salt and ginger garlic paste.
Next add in the water and then pressure cook it for 6 whistles or until the mutton is cooked. Once the pressure subsides open the cooker and separate the mutton and the water. Reserve this water for cooking the biryani.
Heat oil in a pressure cooker once its hot add in the Fennel Seeds, cinnamon Stick, bay Leaves, Black Stone Flower let it sizzle and then add in the sliced onions and green chilli, Sauté till glossy and then add in the ginger garlic paste saute till the raw smell leaves.
Next add in the tomatoes. Cook till mushy. Mix well and then add Mint and coriander leaves cook till they shrunk. Next add in the cooked mutton pieces.
Mix well and cook for 2 mins and then add in the chilli powder, Turmeric powder, Garam Masala and Salt.
Mix well and then add in the soaked Basmati Rice. Mix well and fry for 2 mins.
Add in the measured water, you can also add the water which is reserve while cooking the mutton. Add in Lemon juice and wait it comes to a boil and then close the pressure cooker. Once the steams come rigorously put the whistle on the cooker and cook for 3 more mins in a high flam and then switch off the cooker. Wait till the pressure subsides on its own and then open the cooker. Delicious Mutton biryani in pressure cooker is now ready.