Sift the split pea flour, self raising flour and baking powder into a large bowl. Stir in turmeric, cumin and salt. Gradually stir in enough water to make a very thick batter. Stir in onion, garlic and green onion.
Heat oil in a large heavy frypan over medium-high heat. When the oil is very hot, drop tablespoonfuls of the batter into the pan and fry until golden brown on both sides. Remove to paper towels to drain.