Take a pan and add the oil

Heat the oil and mix the mustard seed

Add the chopped onion fry the onion

Add the chopped tomato

Mix the boil potato

Add salt turmeric and red chilli powder mix well

Fold the potato mixture and.Ake shape like small tikki or ball

Take idli stand Grease with oil

Pour the idle mixture, add potato tikki then again pour idli batter over it.

Steam in microwave for 4 minute.

Ready stuffed idli, serve with sambhar or sauce.