Clean and wash urad thoroughly under running water until the water runs clear.
Soak for 10 minutes and drain. Now air/sun dry it on a clean muslin cloth. No moisture should remain.
Dry roast the dried urad in a pan over low heat, till it becomes slightly brown and a nutty/roasted aroma, is released.
Allow to cool down a bit. Grind to a coarse powder. In a mortar and pestle make a coarse paste of garlic, ginger, green chilli, coriander seeds and stalks using ⅛ teaspoon of salt and water.
In a heavy bottom kadhai, heat mustard oil. Add asafoetida and mustard seeds.
Once seeds start spluttering, add fresh paste and fry for 1 – 2 minutes.
Next, add urad powder, stir to combine, and fry for 2 – 3 minutes. Add water. Continuously stir to avoid lump formation.
Bring the chainsa to boil while continuously stirring. Now reduce the heat, add salt, turmeric, chilli and coriander powder.
Now let chainsa simmer and cook over low heat till it is thick and creamy, and the dal is nicely cooked. This takes 20 minutes. At this stage, if you think its not creamy enough, add wheat flour slurry. And if it's too thick add little hot water.
For tadka, Heat ghee in a small pan. Add dried red chillies and jumboo. Cook for 10 – 20 seconds. Pour this sizzling tadka over the Chainsa. Cover and let Chainsa sit for 5 minutes before serving.
Add freshly chopped coriander and green chilli.
Serve Pahadi Chainsa warm with bhaat (cooked rice), lai ki sabzi, and mooli ka thechua.