Soak biriyani rice in enough water for 5-6 hour or overnight
Drain the soaked rice and add grated coconut,cooked rice and mix well
Add them in a wet grind jar,just add water enough for grinding the rice.if you add too much water then you wont be able to grind the rice well.
Grind to a smooth batter and then take it in another bowl.add more water to get a thin flowing water consistensy.add salt as required and stir well.
Heat a non stick pan.pour a ladle of batter into it.the pan should be hot such that when you pour dosa,it should be flat and thin.
Biriyani rice neer dosa is ready to serve.Best served with beef curry