- Wash nicely the mangoes and cut into small pieces as required. 
- Take mango pieces in glass bowl and add turmeric powder and salt, mix it nicely with mango pieces and then cover with a cloth or cling film and keep it aside for 7-8 hours. After that you will see, mango pieces will leave water. 
- Meanwhile wash the chickpea pieces and then dry these on a kitchen towel. 
- Squeeze out the water from mango pieces, keep in a separate glass container and refrigerate it. 
- Soak Chickpeas in Magno turmeric water overnight or for next 7-8 hrs. Chickpeas will absorb water and become soft after the soaking time. 
- Now take out the mango bowl from the refrigerator. You can dry it on a kitchen towel for 1-2 hrs or leave on the counter till it comes to room temperature. Then mix chickpeas and mango pieces together. 
- Meanwhile dry roast the fennel seeds, methi dana. The traditional recipe has fenugreek powder/methi dana powder also but since I did not have it I skipped it. If you have fenugreek powder you can use 1 tbsp of it.. 
- Mix all the spices together, and add to mango and chickpea bowl. 
- Heat a pan on high flame for a minute. Switch off the flame, and add mustard oil to it, it will give smoke we call it cooking the oil(Tel Ka pakna). Let it cool down a bit, and add it to the mango bowl with all the spices. Do not add very hot oil. 
- Mix everything very well, coating all the mango pieces with spices and oil. Once the pickle comes down to room temperature, transfer it into a sterilized jar and with lid and keep it out in sun for 7-8 days. 
- Once the pickle is ready, just enjoy it with your favourite paranthe, dal chawal, pooris, theplas and mathris.