Buy the mangoes up to a week in advance and ripen them at room temperature. Check the fruit daily and put the ones that ripen early in the fridge. Apple pectin comes as a powder, and should be ...

If you can't find green mangoes, or prefer to eat ripe ones, you can use 1 ripe mango and 1 tart green apple (core removed). As well as sourness the green mangoes provide crunch so an apple is a ...