Now add in the cooked rice on top and then the milk mixed with food colour, cover with a tight lid and cook on low heat for 15 min
The tip to make any rice dish separate and not be sticky is to not open the lid as soon as you shut the flame. Always allow to stand 5 min and only then open the lid and mix in the rice.
Also keep in mind to never ever use a wooden spoon to mix any rice dish, especially a delicate dish like prawn pulao.
Use a large steel spoon so your grains are intact.