Add semolina and curd in a mixing bowl and mix well. Heat cooking oil in a wok. Add mustard seeds and when cumin seeds splutter add urad dhuli dal and chana dal and roast till it turn pinkish. Add curry leaves and cashew nuts in it and mix. Transfer this tempering in suji curd mixture with salt and mix well.
Add baking soda and pour lemon juice on it and mix well. Grease the idli mould and put 1 tb sp mixture in each mould.
Put 1 glass water in a pressure cooker. When it comes to boil keep idli mould in it and place lid over it without weight and steam for 12 minutes on medium flame. Switch off the flame. After 15 minutes open the lid and demould the idlis and transfer it in a plate.
Serve hot with peanut chutney.
