Either have I.
I attached a larger photo below for inspection.
To me, it looks like the fruit is split open with a knife.
Not sure if this effect is achieved post harvest,
or initiated slightly before harvest.
Effect is visually appealing.
In the larger image,
it looks photo shopped,
but I think that is because of color saturation,
could be wrong.
Pictures were taken in China I believe,
at a fruit market.