Prawns biryani

Fry onions and tomatoes and all the masalas (except Zaifer Javantari). Then add a little bit of water and then (bhonde lain). After that add potatoes. After they are 75% cooked then add the prawns and mix it well. Then in a (daichee) add the Masala and then add the rice and food colouring, then out it to steam-(dumm).
Prawn Biryani is ready