It's a native of Central America and it looks a bit like a large, rough skinned mango.
It is a delicate fruit that bruises easily so you'll find it in the stores as a hard under-ripe fruit. You'll know when it's ready to eat when you feel some give in the flesh and a more obvious sign is that the flesh itself becomes sweet potato/salmon coloured.
Describing the taste is a little more difficult. You'll read descriptions such as pumpkin, sweet potato, almond, cherry, avocado, spicy, berry, peach and apricot - what you can gather from that is that it tastes like mamey sapote. It's a fruit that left us a bit ambivalent - interesting but not interesting enough especially when compared to something like mango.
From all my reading it seems that one of the best ways to use this fruit is in a smoothie or milkshake so I've decided to heed that advice and see if our opinion could be improved.
[Enough for 2]
½ mamey sapote, peeled, cut into pieces
1 scoop ice cream or yoghurt
1 to 1½ cups milk
Place the sapote, ice cream or yoghurt and milk into a blender and blend until thick and creamy.
Pour into glasses and serve at once.
While the fruit in its raw state left us a little unimpressed, the smoothie won us over. I don't know if its the influence of the milk but the taste was fabulous, I could detect some chocolate notes coming through. It looked beautiful in the glass and was refreshing to boot.