1.Sift besan, spices, baking powder and salt into large bowl; stir in seeds, onion, kumara and chilli. Gradually stir in enough water to make a thick batter.
2.To make green chilli yoghurt: Combine all ingredients in medium bowl.
3.Heat oil in wok or deep wide saucepan; deep-fry rounded teaspoons of batter mixture, in batches, until browned. Drain on absorbent paper.