Mix banana, green chillies, coriander leaves, cumin powder, turmeric powder, red chilli powder, salt, sugar. Mix together gram flour, coarse wheat flour and soda bicarbonate and add it to the banana mixture.
Add a little water to make a thick batter. Keep covered for about half an hour. Just before frying mix in chopped methi leaves.
Add two tablespoons of hot oil and mix. Heat sufficient oil in a kadai. Drop the batter with hand and deep-fry on moderate heat till golden brown. Drain onto an absorbent paper and serve hot with green chutney.