In frying pan, add 500ml water, mangoes (without peeling) and cook for 10-15 minutes or until mangoes become soft.
Remove mangoes from pan, let it cool down and peel off the skin.
In frying pan, add peeled mangoes, 1/2 cup water, sugar, crushed black pepper, chili flakes, ginger powder, black salt, vinegar and steam cook for 10-15 minutes.