Take rava (suji) in a bowl.Add curd and salt.Mix and cover. Leave for 10 minutes.
Heat oil in a pan,add onion,green chillies and chopped ginger.Saute for 1 minute.
Add veggies,mix.Add powdered spices also.Add salt.Mix and cook on low flame for 2 minutes.
Add boiled and mashed potatoes to the veggies,mix well.Put off flame and keep aside.
Now add soda bicarb to the rava and mix well.Add some water to make a batter of dropping consistency.
Meanwhile in a pan,put a stand and heat the pan.Add 2 cups of water,cover and let it boil.
Meanwhile grease 3-4 small steel bowls and transfer the idli batter into bowls.Tha bowls should be half filled.
Put steel bowls into pan,cover the pan and steam the idlis on medium flame for 6-7minutes.
After 6 minutes check the idlis by toothpick.
Take out idlis from pan,let them cool for 2 minutes.Demould the idlis.Cut them horizontally.
Put 2 tbsp potato stuffing on one piece of cut idli,and cover from another piece of idle,press gently.Prepare another one like this.
Heat a pan and heat oil,add mustard seeds and red chilli powder.
Put idli sandwiches in the pan,saute for 30 seconds on each side.(ooops!!!! Forgot to take the snap of this step)
Take out the idli sandwiches and serve hot with green/peanut chutney.
