Wash and soak the dal in two cups of water for ten minutes or longer.
In a pressure cooker combine soaked dal with 2½ cups of water, salt, and turmeric. Cook over medium high heat.
When the pressure cooker starts to steam, reduce the heat to medium and cook for another six minutes.
Turn off the heat and wait until steam has escaped before opening the pressure cooker. Dal should be soft and mushy.
Mix the dal well enough to remove lumps. If the dal is thick, add up to one cup of water.