In a small vessel, add lukewarm water to the yeast and sugar and keep it till it rises. (Do not add hot water as the yeast will not rise).
Add the rava with water and boil till it becomes thick. Keep it to cool.
When it becomes cool, add this to the rice flour and mix well with the yeast. (Take care to add minimum amount of water when u mix the flour) Mix it till it becomes a very soft dough. Keep it overnight.
Take the dough and mix it with the coconutmilk and a pinch of salt until it gets a loose consistency.