This spicy, fresh-tasting Indian chutney is the perfect addition to any curry, particularly a lamb or chicken-based recipe. It is also delicious simply scooped up with poppadoms, parathas or chapatis.
Pour the vinegar into a preserving pan. Add all the remaining ingredients, except the mangoes, and slowly bring to the boil. Add the chilli seeds if you like a hot flavour.
Reduce the heat and boil gently for about 10 minutes, stirring occasionally, until the mixture is reduced by a third.
Add the mangoes to the pan and simmer gently for 1 hour until