In a pan, add oil or ghee.
Add Rava/ sooji and roast on low flame for 5 mins. Remove it to a bowl.
In the same pan, add oil or ghee. Add mustard, split urad dal, gram dal, ginger, green chillies, curry leaves and cashews.
Add this to the roasted rava/ sooji along with curd.
Mix well and let it rest for 10 mins.
Now add a pinch of baking soda and mix well. Once you have added baking soda, you should steam the idlies immediately.
In a Idly cooker, Add water and let it boil. Meanwhile in the idli plates, apply oil or use cloth.
Pour a ladle full of batter in each slot. Keep this plate inside the Idli cooker and cook for 10 mins.
Yummy Rava Idli / Sooji Idly is ready.
Serve Chutney or sambar.