Prepare Batter: Mix soaked poha with gram flour, onions, tomatoes, green chilies, coriander, salt, turmeric, and cumin.
Add Water: Gradually add water to form a thick, smooth batter.
Heat Pan: Heat a non-stick pan and grease it lightly with oil.
Cook Chilla: Pour a ladleful of batter onto the pan, spreading it evenly. Cook on medium heat until golden brown, then flip and cook the other side.
Serve: Serve hot with chutney or yogurt for a delicious breakfast.