Take dal in a pressure cooker. Cover it with 2 cups of water. Pressure Cook dal for 3 whistle. Switch off the flame and let the steam go all by itself. Open the pressure cooker and mash the dal well.
Take the grinding ingredients in a blender and make into a puree.
Pour the dal in a kadai. Add ½ cup of water to dilute it.
Add in asafoetida, salt, ground masala and turmeric powder. Mix well. Let this come to a boil.
Simmer for couple of mins.
Now make tempering by heating oil and crackling in mustard and curry leaves. Pour this over the dal and mix well.