Wash and peel the mangoes.
Chop them into medium sized pieces.
Heat oil in a pan.
Add mustard seeds, fenugreek seeds, hing and broken red chillies.
Saute for few seconds.
Add chopped mangoes.
Saute for few seconds.
Add salt, turmeric powder and red chilly powder and saute.
Cover and cook for 8 to 10 minutes or till mangoes become soft.
Add the jaggery powder and cook uncovered until the jaggery melts.
Turn off the heat and allow it to cool completely.
Transfer into a glass/cermaic jar.
Store in the refrigerator for 3 to 4 weeks.