A sweet, sour, and spicy Gujarati mango preserve cured slowly in unrefined jaggery and aromatic spices. It balances sharp fruitiness with deep caramel sweetness and a fiery chilli kick.
Place 6 mangoes (stoned and cut into cubes) into a large bowl, season with salt to taste, and add the curing turmeric, tossing until every piece is evenly coated.
Lay the seasoned mango pieces out in a single layer on a clean dish towel or cloth to dry overnight.
Transfer the dried mango into a large bowl, add the pickling spices, 1400 g chopped jaggery (or soft brown sugar), 275 g split mustard seeds, and 2 tablespoons oil, then toss gently to combine.
Spoon the mixture into a wide-mouthed glass jar and tie a piece of muslin over the rim.
Store the jar in a cool cupboard for several days, stirring the contents every 2 days using a clean, dry spoon, until the jaggery melts completely into a thick syrup and the mango softens slightly. Decant 1 to 2 cups at a time into a smaller jar for everyday use.
Steep a tiny pinch (0.1 g per 2 g turmeric) in 2 tbsp warm water; use to match the rich golden hue. Contributes an aristocratic, honeyed floral flavour rather than earthy bitterness.
Use 80% of the weight. Granulated sugar is sweeter by weight, but gives a cleaner, one-dimensional sweetness that lacks jaggery's caramel, molasses depth.
Soak and blend into a paste; use 100% to 120% of the weight. Adds rich, natural, fruity sweetness with complex, dark molasses notes that thicken the gravy.