Mix all the above ( except cooking soda) and soak for at least 3-4 hours.
Heat up oil and mix the batter once before you start off.
Add cooking soda if you prefer more soft and fluffy bonda.
Mix cooking soda with water and add for better mixing.
Now use a ladle to drop off the batter into oil.
Fry them to golden brown , flip and remove off oil.
Note : Don't crowd the oil. Drop on batches. Not more than 5 - 6 in a batch. See to that you don't take much time in between every bonda you drop.