Wash kadam so well, preferably with warm water.
Cut the stems off just above the bulb and further cut them into 3-4 inches length.
Peel the Skin of the bulbs.
Slice the bulbs preferably into wedges.
Spread everything on some clean sheet or tray and place under the sun for 1 to 2 days (depending upon whether). As we are making this pickle in extreme hot whether (June), we kept it for a day only.
Transfer the dried kadam in a big bowl.
Dry roast carom seeds, fenugreek seeds and mustard seeds on low heat for couple of seconds.
Grind them into a powder once they cool completely.
Add these powdered spices into kadam.
Also add red chilli powder, turmeric powder, salt and mustard oil.
Mix so well.
Transfer the kadam in a clean sterilized jar.
Close it tightly and put the jar under the sun for a day.
Then bring the pickle back to kitchen and start using after 2-3 days.