Peel the ripe and juicy mango’s (Thai or Indian mango’s preferred) and take all flesh from the pit. Cut up in finger sized pieces and reserve
Peel the garlic and crush. Reserve
Peel the ginger and cut in very small pieces. Reserve
Peel the half onion and dice
Cut the chilli pepper in small rings, after removing the seeds.
Place the oil in a medium sized pan and add at medium heat the mustard seeds. When they pop add the crushed garlic and the finely sliced ginger.
After 1 minute add the diced onion at medium heat and then sweat at low heat for 8 minutes
Then add the other spices and salt and stir.
After one more minute add the mango pieces, the sugar and the vinegar. Stir well, let it come to a boil
Let simmer for 1-1 1/4 hr, while occasionally stirring. Do not place a lid on the pan, as acetic acid and water (the main ingredients of vinegar) need to be cooked off.
Poor the mixture in sterile jars and close. Store in the refrigerator or freezer.