To a pressure pan, add drained tur dal, chopped palak, turmeric powder, 1/2 cup water and close with lid.
Cook over medium flame for 3 to 4 whistles or till the dal gets cooked well.
Once the pressure releases, using an immersion blender grind both to a coarse paste. You can also grind it in a mixie jar & then return it to the pan for cooking further.
Add ground paste, rinse the jar with 1/2 cup water and add it to the pan.
Add salt and mix well to combine everything.
Cook over medium flame till it begins to froth on top.
Switch off the stove and transfer to a serving bowl.