Wash both the daal separately.
Soak each of them in a separate container for 3 hours.
Drain the water completely
Combine Urad dal, Ginger, Green Chilli, Cumin Seeds and Hing
Grind to a smooth & thick paste in a blender
Now grind Moong dal separately in a blender to a thick and smooth paste
Mix both the batters completely in a mixing bowl.
Take a broad vessel like Paraat and transfer the mixed batter in it. Whip the mixture briskly and vigorously till it becomes light and fluffy with the help of hands or you can whip it with the help of whisk or manual beater in a deep vessel.
Note: At the time of whipping the batter, if the consistency is too thick then add very small quantity of water in it.
The consistency of the batter should be medium thick (It should not have a binding consistency).
To check the consistency of batter, place a few drops of batter in a bowl of water. The batter having the right consistency will float on top of the water surface otherwise it will sink or dissolve in the water.
Take the required quantity of oil in a Kadhai (indian wok) for deep frying and heat the oil on medium flame.
To check the oil temperature for deep frying bhalla, put a small quantity of batter in the oil. It should sizzle and come up on the surface of oil swiftly and gradually.
Now oil is ready.
Drop the batter carefully with your fingers or with the help of round shaped spoon in the oil
Note: You can moisten the spoon with a bit of water for easy slide of batter.
Deep fry the bhalla on medium flame. Flip the bhalla on different intervals till it turns golden brown.
Note: Always take the batter in less quantity in comparison to the required size of bhalla as when we soak the bhalla in water, it becomes bigger in size.
Now leave the bhallas outside for 2-3 minutes.
Take another bowl. Put some lukewarm water in it and soak all the bhallas in it. Make sure all the bhallas completely soak in the water.
Put some salt in the soaked bhallas and soak them for 25-30 minutes.
Take one soaked bhalla in your palm and press it between the palms carefully to squeeze the excess water.
Repeat the procedure with all bhallas