Make a check list ; Keep the necessary items on hand. In a large bowl, take the left over dosa batter. add the remaining ingredients,including except teff or ragi flour. and oil. Add the required water and salt and whisk. It will ferment in 2 hours.
If desired, add teff or ragi flour to half the flour and add the required water and salt. Whisk and rest for 1 hour.

Grease a dosa skillet over medium high heat. Cook as you would normally do. I use a cast iron skillet. Pour 1 cup of batter over the skillet and make a thin dosa. After 1 minute, lift it with a spatula to check if the bottom is browned. Sprinkle chili powder on top if desired and turn it over. Remove from heat and transfer to a serving platter.

. You can serve it with chutney, chili powder, sambar or yogurt. My brother likes to eat it with yogurt. I like to eat with chili powder Coconut chutney for Sridhar. Today it is mint. I Aloo made chutney with mutakathan keerai, curry leaves and served with dosai