Take urad dal in a mixie jar and grind it into a fine powder.
Next take around 4 tsp (heaped) of urad flour in a bowl.
Add in finely chopped ginger, green chili, curry leaves and coriander leaves. Give a quick mix.
Add in whisked curd or buttermilk and mix it well. Make sure no lumps are left out. It shall have thick milkshake consistency. You can also substitute a part of curd (or buttermilk) with water. Also please note, curd or buttermilk should not be sour.
Add in salt and mix it well again.
Temper it with oil, mustard seeds, asafoetida and buttermilk chili. Serve it with hot steaming rice and enjoy.