Choose fully ripe but not overripe, or even slightly spoiled alphonso mangoes.

Peel and cut into large slices with a clean stainless steel knife.

Discard the stones.

Sprinkle some castor sugar at the base of a freezer container.

You may use freezerproof plastic see-through containers for convenience.

Make sure the lids are airtight.

Pile about 2 inches of mango slices.

Sprinkle some more sugar.

Repeat till container is full or mangoes are exhausted.

Top with a final layer of castor sugar.

Pack down tightly with a flat spoon.

Close lid tightly and freeze.