Wash and air dry the green chilies. Pat the green chilies dry using a clean kitchen towel.
Cut the chili heads and then cut then length wise, and then cut them into halves to make them into bite sized pieces. Keep them aside.
Add mustard oil to a small sauce pan. On medium heat, bring the oil at its smoking point. Once you start seeing the smoke, turn off the stove and let the mustard oil cool down.
Now in a mortar pastel, add the split mustard seeds. Pound them lightly, to release the oil and bring out the aroma of mustard.
Add the pounded split mustard in a plate. Next add turmeric, salt and asafetida. Mix them all well.
Once the oil is completely cool, add the oil to the prepared split mustard seed mix. And give it a mix again.
Add lime juice and mix once again.
Now add the prepared green chilies and mix them well.
Add the chili pickle in a clean sterilized canning jar. You can enjoy it right away, but if you let the pickle infuse the flavors for a couple of hours it tastes even more amazing.
Refrigerate the pickle and enjoy for up-to 3 weeks.