Pressure cook the toor dal along with the vegetables, green chilli and water.
When the dal is cooked, put it on medium flame in a deep-bottomed vessel.
Add the turmeric, tamarind water (squeeze and discard the tamarind), salt and sambar powder.
Let the dal boil until it foams up.
In a separate pan, heat oil on a medium flame, Add mustard seeds, fenugreek seeds, asafoetida, red chilli and curry leaves and let them splutter.
Add this seasoning immediately to the dal.
Remove the dal from the flame.
Garnish with coriander leaves.