Wash and soak rice for 3-4 hours or you can soak over night too .
Peel and cut raw banana to big chunks . Put it in water so that they don't dis color .
Later grind Raw banana ,green chilli ,jeera ,grated coconut and salt along with rice.
Grind them to a nice smooth batter. Take the ground batter to a vessel.
Heat a tawa.Pour a laddle full of batter. Spread it in circular direction to make it to thin dosa.Drizzle few drops of oil around it.Cover and cook on medium flame for abt 1-2 mins.No need to flip over and cook.Once its done, the dosas come out easily from the tawa .
Fold and serve crispy bread dosa accompanied with chutney or sambar or chutney powder of your choice.Relish when hot to enjoy the crispiness.
You can omit coconut , jeera and green chilli and make plain dosa .