Take the sevai add a tsp of oil and mix so that it coats well.
Add the lemon mixture and combine well.
Now heat a kadai with oil add mustard seeds and when it splutters add bengal gram and urad dhal to it.
After it is golden add onion,green-chillies and curry leaves to it and saute till it becomes translucent.
Now add the sevai combine well for 5-7 minutes add coriander leaves,switch off and add grated coconut and serve.
Notes
Adding grated coconut is optional you can leave it.
Can very well make a simple coconut chutney to have with this idiyappam sevai.
You can very well make idiyappam in your own style,using idiyappa mavu/flour and keep ready.