Wash the mutton pieces with little salt atleast 5 times.keep it aside.
Heat refined oil in a kadai and add saffron,sugar and fried onions and saute for 3 mins.
Take a pressure pan , add mutton pieces, ginger-garlic paste,saffon-fried onions, ground spices,mint-coriander paste,almond paste,curd,green chillies,salt,lemon juice and ghee.
Now add 1/2 cup ginger-garlic paste washed water,1/2 cup almond paste washed water and mint-coriander paste washed water.
Pressure cook upto 5 whistles or 10-12 mins and keep it aside for 10 mins.
Prepare the coconut milk(1 + 2 1/2 cups).Wash and ghee-saute 2 cups basmati rice.
Open the pressure cooker and add ghee-sauted basmati rice and 3 1/2 cups fresh coconut milk.Sprinkle 1 tsp salt,crushed black cumin seeds and nutmug powder.Mix well for a min.
Pressure cook this upto 1 whistle and turn off the flame.
Serve this Mutton Biryani hot with raita of ur choice, or kebab.