Heat oil in a pan , crackle mustard seeds and keep it aside
Soak tamarind along with salt in water and extract juice from it.
Add a little sambhar powder and bring it to boil
Grind Fresh mint leaves ,garlic ,cumin ,pepper and red chilies into a coarse powder and add it to the above
Allow it to boil once more
Remove from flame, add asafetida , fried mustard seeds.