Rinse poha in water and drain the water. Add 1 cup of curd to poha and soak for 10 mins. If your poha is too soft, don't need soaking. you can mix curd and poha together.
Now add 1.5 cup of idly/rice rava, 1 cup curd, and water as required.
Let this mixture soak for 15 mins. The idly rava will absorb all the water.
We will have a thick mixture and slowly add water to get a nice idly batter consistency, Add water slowly, we don't want the mixture to be too watery.
Add some salt to taste. just before steaming add a pinch of baking soda and mix well.
Don't rest the batter, grease the moulds, and pour the mixture in the idly plate.
Steam for 10-15 mins in medium flame.
Serve hot with any spicy chutney