n a mixer pulse the moong dal , cumin seeds and black pepper.(i normaly crush the pepper in a pepper crusher as my kids will prefer this way)
Mix with idli rava and keep it aside.
In a pan add oil and temper with mustard seeds, asafoetida , peanuts(if adding) and red chillies.
Add 5 cups of water to this and add salt to this.
The ratio of rava and moong dal mixture and water is 1:2.5
When the water comes to a rolling boil, simmer the flame and add the idli rava + moongdal mixture.
Add coconut(if using) at this stage.
Mix well without any lumps.
Let the flame be in medium.
Stir well.
When the water gets absorbed completely switch off the flame.
When the mixture becomes warm and can handle the heat with your palms start making round shaped balls or oblong shapes.
Steam in a greased idli maker for 8- 10 minutes.
Serve hot with any chutney .