This style of Indian pickles or achars differs greatly from Western counterparts because they are not vinegar based. Combining copious quantities of oil, salt, acid, and spices is an age old South Asian preservation technique that finally results in a lipsmacking achar. There's one more difference: unlike Western pickles that are stored away from the sun, these pickles are left out in the hot sun to cure and develop their flavours. To reduce the risk of spoilage, use clean, dry, and sterile containers, and keep moisture out by patting the lemons thoroughly dry before pickling. Add this lemon achar to any meal for a spicy, zingy boost of flavor; a little bit really does go a long way.
I prefer using thin-skinned lemons like Meyer lemons because they have less pith and are not as bitter.
- Nik Sharma