Heat the tawa or griddle on medium high heat. To check if the tawa is hot enough, sprinkle some water and it should sizzle immediately and the droplets should skitter.  

Slightly grease the tawa with oil. Pour the batter and spread it quickly in a circular fashion and make it slightly thicker than the regular dosa. Immediately sprinkle the podi on top. Cover and cook for a minute or so.

Once the top-side gets cooked and the bottom is browned (golden brown), remove the dosa from the tawa. 

You can serve this with chutney or sambhar.