Crispy Onion Bhaji Rings

Make the dip by dicing onion and adding to all other ingredients into a food processor and blitzing until smooth, leave to one side. Slice onions into medium thick rings, separate and soak in chilled water for 20 mins. Meanwhile add gram flour, plain flour, baking powder, chilli powder, turmeric, cumin, coriander and nigella seeds to a bowl and mix well. Drain onion rings, coat with flour mix dusting off excess and place on a wire rack. Add chilled sparkling water to remaining flour mix to create a slightly thin batter. Dip each ring into the batter and deep fry until golden, remove from oil and drain on kitchen towel. Serve with a drizzle of mint dip