Prepare Mangoes: Wash and clean 1 kg of raw mangoes, then soak in water for 2-3 hours.
Cut Mangoes: Cut the mangoes into wedges, ensuring they are not too soft.
Mix Salt and Turmeric: Add 2 teaspoons of salt and 1.5 teaspoons of turmeric to the mango pieces and mix well.
Let Mangoes Rest: Cover the mangoes and let them sit overnight.
Drain Water: After resting, drain excess water from the mangoes using a sieve.
Dry Mangoes: Expose the mangoes to sunlight for a day until they are slightly hard but not completely dry.
Prepare Spice Mix: Combine dried coriander, fennel, mustard, fenugreek, kalonji, and black pepper. Optionally, fry spices lightly.
Mix Spices with Oil: In a clean container, add mustard oil and the spice mix. Then add salt, Kashmiri red chili powder, and mix well.
Combine with Mangoes: Add the spice mixture to the dried mangoes and mix thoroughly.
Sun Dry the Pickle: Cover the pickle and expose it to sunlight for 5-6 days.
Add Vinegar: Once the pickle is ready, add vinegar and mix well before storing.