Heat oil for deep frying.In a mixing bowl, take sliced onions, chopped green chilies, crushed ginger, curry leaves. Mix well. Squeeze the onions gently. Set aside for 5 minutes.
Add rice flour, gram flour, carom seeds, salt and mix well.
Take around 3 teaspoons hot oil and add to this mixture. Now sprinkle 2-3 teaspoons water at a time and make a tight dough like mixture.
Now take some dough and add to the hot in sprinkling motion. Deep fry until golden brown in medium flame. Do not add too many pakoras at at time. There should be enough space for the pakodas. Also do not cook in high flame.
Fry until the sizzling sound is reduced and pakodas are golden and crispy.
Drain excess oil on a kitchen tissue or strainer. Serve onion pakoda hot with tea.