Peel and grate mangoes and put this in a kadai and pour some water over it..

Cover and let it steam for 10-15 mins untill the mangoes are cooked..Remove and set aside.

Now heat oil in a kadai and add in mustard and cumin seeds and allow it to crackle..

Now add in hing, chilli powder and salt to this..

Now add in cooked mangoes and mix well..Add in jaggery and mix well.

Cover it with a lid and simmer for 15-20 mins until oil floats on top..

Let this cool completely before storing in a air tight container..

Refrigerate for several weeks..