Mix thick yoghurt with chopped onion, green chillies, capsicum, ginger, coriander leaves, chaat masala, and salt.
Cut off the edges of the bread. Use a rolling pin to flatten the bread slices to make them easier to roll.
Add a spoonful of the yoghurt mixture in the middle of the flattened bread slice. Roll the bread tightly to form a cylindrical shape. Seal edges with water.
Deep fry the rolls for about 2-3 minutes.
Serve with your favourite chutney or dip.