Add oil in a pan. As the oil is heated add the mustard seeds to pop. Also add one dry red chilli along.

As the aroma is released add the raw mangoes in the pan and stir. Add salt to reduce its tangyness. Add turmeric too and stir and cook for some time.

Add water to it and boil. Simmer the gas and let it cook covered until the mangoes are some what cooked.

If they are then add sugar in it and let it simmer for some time until the sugar melts. Check to taste. Add sugar as needed. Cool it and Your Aam Chutney is ready. This can be consumed within a period of two weeks if refrigerated. But I am sure it won't stay that long if you will like it :)

Aam chutney is very good for digestion. In India Bengali's prefer this after a meal. It's recommended to have it in very small portions otherwise can cause acidity.