Sautée onions for 5 minutes in oil or ghee until soft and golden, then add everything but the mangoes.
After 15 minutes on a low / med simmer, add mangoes for 5 minutes at the end. Mix well.
Cool and decant into jars and pop in fridge up to a month, or freeze half up to 6 months so you have some for the mango off season too!
That’s it. It will last a month in the fridge if not more.
Let me know how you go! I’m totally addicted.