Wash the mangoes very well because we are using them with skin intact.
Make sure mangoes should be completely dry and there remains no traces of water because water spoils the pickle.
Cut the mangoes into long strips/Juliennes and discard their seeds.
Take a pan and add fennel seeds (sounf), fenugreek seeds (methi dana), yellow mustard (peeli sarsoo) and black pepper corns (kali mirch).
Roast them on low heat until aromatic.
Remove the pan from the heat and let the spices cool down completely.
Add them to the grinder jar.
Also add turmeric powder, kashmiri red chilli powder, red chilli powder (spicy) and salt.
Grind them to a fine powder.
Add this powder to the mango Juliennes.
Also add nigella seeds (kalonji).
Lastly add mustard oil.
Give them a good mix.
Instant mango pickle is ready. Store in refrigerator and finished within 8 to 10 days.