A sharp and savoury Indian condiment made by steaming quartered limes with garlic and salt, sun-curing them, and finishing with an aromatic spiced oil. It delivers a punchy balance of sour, salty, and pungent heat that deepens as it matures.
Pierce the skins of the 1000 g limes all over using the tines of a fork.
Place the pierced limes into a heatproof bowl along with the juice of 0.5 lime, 125 g salt, 90 g garlic, and the chilli spice (40 g chilli powder), stirring thoroughly. Set the bowl into a steamer—or rest it on a trivet inside a lidded pot with a shallow layer of water beneath—cover, and steam for roughly 10 minutes until the rinds soften.
Transfer the softened limes to a clean bowl, cover the top with muslin, and position in direct sunlight or a warm room for 2 days. Bring the bowl inside at night to avoid dampness.
Warm 91.3 g vegetable oil in a frying pan over medium heat. Add the cumin and mustard seeds from the tempering spices and fry for about 1 minute until they begin popping, then stir in the remaining asafoetida. Pour the hot infused oil directly over the limes and toss well to coat.
Replace the muslin cover and let the pickle sit in the sun or on a warm windowsill for another 2 days before transferring into sterilised glass jars.
Use 15% to 20% of the weight (about 1 g for every 5 to 6 g fresh cloves). Whisk into sauces; gives a savoury, toasted garlic flavour without raw pungency.
Use the same weight. The seeds are smaller and hotter; fry in hot oil until they pop, about 20–30 seconds, and reduce the heat if they darken too fast. The dish will be a little sharper.
Use 70% of the weight of whole seed, added with the other ground spices rather than fried whole. You lose the popping texture and the heat comes through more evenly.