Grind the ingredients reqd to make a paste using the boiled water.
Heat oil in a pan.
Splutter mustard seeds and fenugreek seeds.
Add turmeric powder and garlic.
When garlic is half fried, add ginger and stir for a few seconds.
Add the ground paste and saute.
Add the boiled water so as to get a thick gravy.
When it starts to boil, briskly mix vinegar, sugar and salt.
Let the gravy get thick and then remove from fire.
Stir in the dried mango slices when the gravy becomes cold.
Add the husked mustard and mix well.
:- Store in air tight bottle.