Chop them into small bite-sized pieces. Remove the seed.
Place the chopped mangoes in a bowl, sprinkle with turmeric and salt. Mix well.
Let this sit for 24 hours in a covered bowl, allowing the mango pieces to release some water.
2. Sun-Drying (Optional but enhances flavor):
After 24 hours, spread the mango pieces on a clean plate or tray and dry them in the sun for 4-5 hours. This reduces moisture and helps the pickle last longer.
3. Prepare the Spice Mix:
Dry roast mustard seeds and fenugreek seeds until aromatic. Let them cool and lightly crush them (not too fine).
Mix them with red chili powder and asafoetida.
4. Temper the Oil:
Heat mustard oil in a pan until it reaches its smoking point. Let it cool slightly.
Add the curry leaves to the hot oil for an aromatic twist.
5. Combine the Pickle:
Mix the sun-dried mango pieces with the spice mix in a large bowl.
Gradually pour the warm mustard oil over the mixture. Stir well so the spices and oil coat the mango pieces evenly.
6. Storage:
Transfer the pickle to a clean, dry glass jar or ceramic container.
Cover the jar with a muslin cloth and let the pickle mature for 4-7 days. Stir the pickle daily with a dry spoon to ensure even marination.