If you are using regular-sized idlis, I would recommend you cut each idli into 4 pieces. This helps in ensuing the podi mix coats the idli well. This is an optional step.
In a pan, heat the ghee till it melts.
Turn off the heat.
Add the curry leaves powder to the melted ghee and mix well.
Immediately, add the idlis and mix well till all idlis are well-coated with the mix.
Serve immediately
Notes
The 15 minutes required to make this dish includes time to make idlis.