After cutting the fruit, take out the watermelon rind ( White region ). Take off the outermost green skin, as thin as possible and discard it. We would be using only the white part.
Wash & Soak rice, urad methi seeds for 4-5 hours.
1-2 hours before grinding… An hour before grinding, add puffed rice (puri) to the soaked ingredients.
Dice roughly n grind watermelon Rind n coconut. No need to add water.
To the ground watermelon rind Coconut mix .. add soaked rice mix. Grind smooth. Add salt, mix and allow to ferment. Note that watermelon rind has a lot of water so make sure .. you grind the batter really thick. Cover and keep aside.
Morning .. you will see that the batter has fermented well. Mix and check the consistency. Add water if required to get a regular dosa batter consistency.
Heat a Tawa. Pour a ladle full of batter and do like uthappam. Drizzle few drops of oil, cover and cook.
One can make thin crisp dosa too.
Once the dosa s are cooked from one side, if you want can serve as such or flip and roast another side too.