In a bowl, mix gram flour, chopped onions, tomatoes, green chilies, coriander, turmeric, and salt.
Gradually add water to make a smooth, lump-free batter.
Heat a non-stick pan or tawa and lightly grease it with oil.
Pour a ladleful of batter and spread it into a thin circle.
Cook on medium heat until the bottom turns golden.
Flip and cook the other side until crisp and fully cooked.
Serve hot with mint chutney or yogurt.