firstly, trim off the bread sides. you can use white or brown bread. however, preparing with white bread makes the dosa crispier compared with brown.
cut the bread into pieces and add to a large bowl.
add ¼ cup rice flour, ¼ cup curd, ½ tsp salt, ½ ts sugar. sugar is added to give golden colour to the dosa.
now add 1 cup water and rest for 20 minutes to soak.
after 20 minutes, the bread and rava has soaked well.
transfer into the mixi and add water as required.
blend to really smooth paste.
transfer the batter to the bowl and whisk for 5 minutes to make an airy batter.
further, add ¼ tsp baking soda and mix gently.
now heat the dosa pan and sprinkle water, wipe off with tissue paper. this helps to cool the tawa slightly, preventing from turning too hot.
now pour the dosa batter and spread as thin as possible.
pour oil and spread uniformly.
roast on low to medium flame until it turns golden brown and crisp.
finally, enjoy bread dosa with chutney and sambar.