Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2                    mangoes -- cut into 1" squares
   4      teaspoons     chile powder
   3      teaspoons     salt
     1/2  teaspoon      asafetida
   1      teaspoon      turmeric powder
     1/2  teaspoon      mustard seeds
   1      teaspoon      oil

Preparation:

Heat oil in a pan. To that add mustard seeds. When it pops reduce heat to low and add chile powder, salt, asafetida, turmeric and stir for about 3 minutes. Turn off the heat. Let it cool for a while. Add this mixture to the cut mangoes and mix thoroughly. Keep this for 7-8 days for the flavor to seep into mangoes. You can add a little bit of distilled vinegar if you like. It will help to keep the freshness. This is the Kerala mango achar.