Wash the dal several times, until the water becomes almost clear.
In a medium pot combine the moong dal, turmeric, salt, and water. Cook over medium-high heat until it starts to boil. Remove the frothy foam that accumulates on the surface as the dal cooks.
Lower the heat to medium and cook for 15 to 20 minutes, until completely cooked and a little mushy. Stir occasionally and add more water if needed. Turn off the heat.
Puree the dal using a hand blender or regular blender. If needed, adjust the thickness of the dal by adding more boiled water. Mix well. The dal will thicken as it cools.
Add hari cilantro chutney to suit your taste. The chutney gives the soup a fresh green appearance and a tangy flavor.