Mix ragi flour with 4 cups of water and whisk it well without any lumps. Set aside.
Take raw rice in a mixer. Grind it to a coarse mixture like rava.
In a heavy bottomed vessel, boil 2.5 cups of water, add rice and cook it until soft to a porridge like consistency.
Then add the mixed ragi flour mixture and required salt.
In low flame , keep mixing and cook it till it becomes thick and raw taste of ragi flour leaves. It will become shiny and thick. The cooked rice will be seen in between as shown here.
At this stage switch off and spread it in a wide mouth container and let it cool down completely.
Add little water to curd whisk it well, Set aside.
Grind green chillies to a coarse paste.I transferred to anoth wide mouthed container to cool down quickly.
Now to the ragi koozh add butter milk, chopped onions, chopped curry leaves and green chilli paste.
Whisk it well without any lumps, add water to make to a thin koozh consistency. It should be very runny.
Serve Aadi Koozh with onion & chillies.