Wash the chow - chows and take the peel (skin) separately.
Heat oil in a frying pan and add the mustard seeds into the oil and let them burst.
Then add the red chilli, thuvara parippu, chow-chow peels and stir it well and cover it with a lid.
When colour of this mix turns golden, and the peels become very nice, add asafoetida power and salt into it and stir the mix well and put off the stove.
Change the mix into a plate and let it cool.
After about 10 minutes, grind it in a mixer adding some water.
Chow - chow peel (skin) chutney is ready and can serve with dosa / idly / uppuma / cooked rice etc.