Wash, wipe dry, peel and grate raw mangoes. Heat a deep pan, add mangoes, salt and sugar and mix.
Cook, stirring continuously to avoid the mixture from scorching, till all the sugar melts.
Lower the heat and continue to cook, stirring continuously till a syrup of one-string consistency is formed.
Take it off the heat and set aside to cool.
Add turmeric powder and red chilli powder and mix well. Add crushed roasted cumin seeds and mix. Cool completely and store in airtight, sterilised bottles. It keeps well for several months.
You can serve this with roti, parantha, thepla or even bread.