Start heating oil in a large skillet/wok.
When it is not very hot, add the tamarind pieces.
Keep the flames low and roast it for a few minutes. Do not let the color change. Remove to a plate.
Increase the flame to medium and add the green chili slices. Let it roast for a couple of minutes and remove to the plate.
Next roast the garlic, remove.
Roast the cashew/chana dal till it starts changing color and remove to the plate.
Add 1-2 teaspoons of oil, if needed.
Put the mustard seeds (1/2 tsp) , let it splutter.
Add cumin seeds and then the onion and after that the gourd.
Mix well, sprinkle some water on them and cover and cook till the ridge gourd has become soft to touch and is cooked.
Remove to the plate and once all the ingredients have cooked down, grind to.a paste along with the required salt.
To temper the chutney, heat 1-2 tsp of oil in a small pan.
Add mustard seeds and once it crackle, add cumin seeds, urad dal and when the dal has turned slight brown, add dry red chilies and asafoetida.
Take the chutney into a serving bowl, put the cilantro over it and pour the tempering over the cilantro.
Enjoy with rice or dosa.