Q.What Is This Berry?
I thought just looking at the leaves , it was a passion fruit vine. then these tiny green fruit appeared and it turned dark purple/black. I was brave enough to taste it and it was anything but a passion fruit.. It had 1 large seed and it had no flavour
Certified GKH Gardening Expert
That is, definitely, Passiflora suberosa. The Cork Passionflower.
It just may not be the kind that you are familiar with.
They will have similar care to other Passiflora: