Soak whole moong dal in enough water overnight or for at least 8 hours until it becomes soft.
Drain the water and transfer the soaked dal to a mixer jar. Grind it into a smooth paste. Add spinach, green chilies, ginger, cumin seeds, salt, and water. Blend again until the batter is smooth and lump-free.
Transfer the batter to a bowl and add gram flour. Mix thoroughly to achieve a smooth, flowing consistency.
Heat a non-stick pan on medium heat, then reduce the flame to low before pouring the batter.
Pour one ladle of batter onto the pan and spread it gently in a circular motion to form a thin dosa.
Allow the dosa to cook until the upper surface dries. Flip carefully and cook the other side for 10–15 seconds.
Spread a thin layer of ketchup on the dosa. Add a small amount of grated paneer on one side.
Fold the dosa and cook for a few more seconds. Remove from the pan and serve hot.