Take sliced onions in a large bowl. Add gram flour, rice flour, ginger, curry leaves, red chilli powder, baking soda, turmeric powder and salt.
Mix well using a spoon. Add water little by little and mix all the ingredients so that the sliced onion is coated well with the batter.
Do not add more water, if batter becomes too watery then pakodas will not turn crispy.
Heat oil in a deep bottomed pan over medium flame. Check whether oil is sufficiently hot.
Take small portion of mixture in the hand and gently drop 3 to 4 small fritters into the oil and deep fry until they turn golden brown.
Cook them evenly and take them out using slotted spoon and drain excess oil. Place them on paper towel in a plate to absorb excess oil.
Repeat the process for remaining batter. Do not fry them over low flame, it will make them soggy and absorb too much oil.
Serve them hot as delectable snack with a cup of tea or coffee in the evening.