Pickles are an essential part of Indian life, and such is the love for them that people wax lyrical about the tastes and variety. And this subsection of the Indian cuisine is worthy of the praise. There is nothing that is equivalent outside of India.
Pickle making is usually a family affair, with the rooftops crowded with ingredients drying and pickle jars fermenting. But occasionally, one needs a quick pickle, a fresh one, one for an afternoon snack of roti or rice.
Green mango is perfect for this pickle, but alternatives exist. See the notes below the recipe.