This is a sweet and sour chatni. The sugar gives the sweetness ... and the mango gives the natural sour taste.
If you want it very spicy then just increase the amount of red chilli powder.
Need : Raw mangoes (the Totaphuli variety is good for this as it is not too sour), Panch phoron powder , sugar, haldi powder, red chilli powder, mustard seeds, whole red chillies,curry patta, oil and a pinch of salt.
Panch Phoron powder : Take a few teaspoonfuls of Panch Phoron and dry roast on a heavy bottomed pan till it gives out an aroma. Cool and grind into a powder.
How to : Cut raw mangoes into thick slices or cubes. Heat oil in a kadhai. Add mustard seeds, whole red chillies and curry patta. Now add the mangoes and fry for some time. Add haldi powder, red chilli powder and a pinch of salt. Cover and cook till the mangoes are almost done. Now add sugar. The mangoes will let out a lot of water now. Cook uncovered till water evaporates completely. Sprinkle 1 teaspoon of Panch Phoron powder and remove from heat. Serve cool.