Rinse and drain the mint leaves in a colander. Pat dry and keep aside.
Heat a pan, add oil, lentils (urad dal and chana dal) and whole dry red chilies.
Roast the lentils until the appear golden brown. The chilies should crisp up (refer pic).
Add fresh mint leaves and sauté until mint leaves shrink or reduce in volume.
You will see that the mint leaves would wilt and reduce in volume.
Next add coconut, mix once and switch off the heat / flame.
Add jaggery, a marble size tamarind and let it cool before grinding.
Transfer the ingredients to a mixer grinder jar or chutney jar, add salt to taste and asafoetida (hing).
Add couple of tablespoons of water and grind the thogayal into a thick consistency (refer pic below).
Store the thogayal in a clean and dry glass jar.