In a bowl, take all the flours and mix well with salt and soda. Heat little water and once its hot, dip the bread slices in it and add to the flours.
Mix well without lumps. Add water slowly to mix everything evenly. The consistency should be a thin batter. When you take a ladle of batter and pour, it should fall freely and not be thick.
Allow it to rest for 3 hrs max. Then mix once again. And heat a dosa pan or tawa.
Grease some oil on the pan so that the dosa comes out well. Pour a ladle full of batter in a circle movement and spread to form a circle.
If you are not getting the dosa in the regular form, pour in circular and spread to form a dosa. Sprinkle oil on top and let it get cooked in sim. Should not cover this.
Serve with Coconut Chutney.
Notes
It came out very tasty, though it was soft. So this is going to be surely made again.