In Australia we call them chokos. In warmer parts, they grow pretty much anywhere - along a fence, up a tree - traditionally they were grown over the dunny (outhouse / outside toilet). They can cover a huge area, and are prolific fruiters. If you miss one and it hits the ground, it invariably grows too, so your choko vine may in fact be several after a couple of years as the fruits are hard to spot in amongst the foliage.
Because of the mild flavour, when times were tough they were often substituted for apples in crumbles and pies - peel, chop into chunks and gently cook them up with sugar and cinnamon. My grandmother used to preserve them in jars like this and make them into 'apple pies' - nobody ever complained. ;D
They make great pickles and chutney too and can go into stir fries, casseroles, soups.
Never go near my Dad when he's on the ride on mower and doing the bit near the choko vine - any that go under the blades are fired out like cannon balls!