Cook the Mango: In a heavy-bottomed uruli or kadai, add the chopped mangoes and a splash of water. Let it cook on low flame until soft and pulpy.
Mash lightly: Once softened, mash with the back of a ladle if too many chances are there.
Add Jaggery: Add good quality jaggery cover and cook until it melts . if impurities are visible melt the jaggery in another pan stain first then add it to the mango pulp and stir continuously on low flame.
Stir with Patience: Just like an elephant never rushes, stir slowly and constantly. The mixture will thicken, darken, and begin to leave the sides.
Finish with Flavour: Add ghee, cardamom. Stir for a few more minutes.
Cool & Store: Once thick and glossy, cool it down. Store in sterilized glass jars. Stay good in airtight container for a year in the refrigerator.
Notes
Use only fleshy mangoes without too much fiber for best results. Fiber in jam is very unappetizing.