Soak raw rice and idly rice together for 8 hours or overnight.
Grind the rice with green chillies and salt. Use a little water while grinding. The batter needs to be of a thick consistency.
Now, wash, peel and grate the bottle gourd.
Squeeze the grated bottle gourd and add it to the ground rice.
Mix the ground rice and grated bottle gourd well.
Now, heat a dosa pan, add a tsp of oil.
Gently place a ladle of batter in the centre of the dosa pan and spread it with the ladle. Drizzle another tsp of oil over the surface of the adai. Let it cook on medium flame. It will take few minutes to cook.
Now, flip the adai and allow to cook for another few minutes.