Add water to idli pan and place it on low heat. Grease the mould with little oil. Pour the batter to the mould and place the mould in the pan on low heat . Cook until steam is let out of the pan. If using a traditional idli cooker it will start to whistle. It can take 15-20 minutes depending on number of plates. Once done, switch off the heat and leave it for few minutes for the steam to settle. Sprinkle some water on the plates and scoop out the idlis. Enjoy it with your favourite accompaniment – chutney/ sambhar/idli podi( gun powder)