Mix all of the ingredients together, except the potatoes, onion and oil. The mix should resemble a thick pancake batter. More water may be added if it is too thick or more chickpea flour may be added if it is too thin. Add the potatoes and onion and drop by spoonfuls into 12 millimeters / 1/2 inch of hot oil. Fry on each side until golden brown. Drain on a paper bag or paper towels.