In a mixing bowl, combine chickpea flour, water, turmeric powder, and salt to form a smooth batter.
Add chopped onion, green chillies, capsicum, and coriander leaves to the batter, mixing well.
Heat a non-stick pan over medium heat and add oil.
Pour a ladleful of the batter onto the pan, spreading it evenly.
Cook for 3–4 minutes until the edges lift and the bottom is golden brown.
Flip and cook the other side for another 2–3 minutes.
Repeat with the remaining batter.
Serve hot with chutney or sauce.