Heat the oil in ladle once hot, add hing, mustard seeds after it sputters add jeera, let it pop and then turn off the heat.
After 1/2 hour + to the rava and cucumber mix add remaining ingredients - chopped coriander leaves, ginger, green chillies, prepared seasoning and mix it well
Put this to the greased idli plates as shown. make sure to mix the batter everytime you take the batter.
Steam cook the idlis on medium high heat for 20 minutes. if you are using a pressure cooker don't put the whistle.
After 20 minutes -- reduce the heat to low, open the lid carefully and check the idlis. If the idlis are not sticking to the fingers then turn off the heat
Leave for a minute and then remove the idlis from the plate.
Serve the idlis with chutney