A bit of research revealed that they are Cape gooseberries. Originating in Brazil then sent to South Africa and Australia, they are not commonly seen for sale. I do remember them in Sainsbury's years ago and they were an horrendous price. Said to be great for jam, or just to toss into a fruit or veg salad.
Our shrub is not that abundant to make jam, but we will save seed to start more plants off.
But where did this come from? And then I remembered: about a year ago a friend asked if we'd like a little seedling of Cape gooseberry. As usual, we forgot to label it up and blithely planted it out as a datura. What a lovely surprise to find another fruit in our garden.




