Soak raw rice for 2 hours.
Drain water completely and rinse again.Then spread the raw rice in a soft towel and allow it to dry say for 30-45mins.
It will be slightly moist only and few rice will stick to your hands when you touch and see, this is the perfect stage.
Then transfer this to a mixer.
Grind to a fine powder.
Transfer to sieve.Sieve it well.
Sieve until you get rava like coarse mixture.Add it to the next flour batch and grind it again else discard the remains.
Sieved flour should be fine.
Dry roast the sieved flour until you see steam coming out of the flour.
Roast it and set aside to cool down.
You should be able draw a line using the flour,roast it in low flame till then.
Cool down completely then store in airtight container.