The initial steps are similar to that of Masala dosa /Dosa.
All you have to do is heat a griddle and pour dosa batter and spread it out.Drizzle oil/Ghee around the sides if required.
Cook till it turns light brow.Flip it over and cook for a few minutes.
Spread some chopped onion on the dosa and fold.[If you don't like the sharp taste of raw onion,saute it with a little oil till the onion is soft and then use it.]
Serve hot with
sambar/chutney.