Heat oil & ghee in a cooking pot, add onion paste & cook on low for 5 minutes until it gets well roasted & oil leaves from the sides of the pot.
3 tablespoons coconut oil, 4 tablespoons ghee
Add cashew powder, chilli powder, turmeric powder & salt and fry for a minute.
¼ cup broken cashews ground to a fine powder, 1 tablespoon kashmiri chilli powder, ½ teaspoon turmeric powder, 2 ⅛ teaspoon salt
Add the drained mutton & 3 tablespoons of the biryani masala powder & mix well.
Add 3 tablespoons of chopped pudina, 3 tablespoons of chopped coriander, curds, lemon juice and stir well.
¼ cup pudina leaves, ¼ cup coriander leaves, ½ cup curds, 2 tablespoons lemon juice
Cook covered for 5 minutes till the mutton absorbs all the masala & ghee/oil leaves the sides of the pot.
Add rice, mutton stock, ¾ + ¼ cup water, remaining 1 tablespoon of mint leaves, 1 tablespoon of coriander leaves & cook till it boils.
¾ + ⅓ cup water
Reduce the heat to very low & cook covered for 10 minutes. Biryani will be semi-cooked at this stage.
While the biryani is cooking, heat a tawa till its hot.
Keep the semi-cooked biryani on the tawa & cook on low heat for 7 minutes. (See note 5)
Let it rest for 30 minutes before serving.