Add soaked rice along with little water, cooked rice, and coconut to a grinder and grind well
Sprinkle water little by little and grind the batter for around 30 minutes till the rice is ground to a fine rava / semolina-like texture
Meanwhile check if the yeast is frothy, if yes mix well and add it to the grinder
Furthermore, add thick coconut milk and salt; continue grinding
Grind till the batter turns smooth
Transfer the batter to a big bowl and ferment for 8 hours. I turn on the oven light and keep the batter for fermentation