Heat oil in a pan, do seasoning and once it splutters, add finely chopped onions, curry leaves and saute well till onions brown. Then add the ground dal paste and cook till it becomes crumbly.
Meanwhile, cut idlis into small pieces.
Once the dal is cooked, add the cut idlis to the pan, mix well and cook for 5 mins with lid covered. Make sure you blend the idlis with the lentil mix well.
Finally fried cashews. This is completely optional.
For adults, you can sprinkle Podi over the idlis. For kids, you can serve with ketchup.