Rinse and dry pat the mango, mango should be absolutely dry.
Now chop the mango in long slices, then cut in quadrants, discard the seed.
Heat a kadhai, add fenugreek and fennel seeds.
Slightly roast them and keep it aside.
Heat mustard oil in a wok, add the chopped mangoes, mix well cook for two minutes.
Now add all the whole and dry spice powders, mix well and cook for two more minutes.
Your aam ka achaar is ready to serve.