|African horned melon|
It's a member of the cucumber melon family, and it's usually eaten raw. The taste, so I'm told, is cucumber-ish, perhaps with a slight amount of tartness and, as it ripens, tastes slightly more fruitier. And as the jelly melon moniker implies, the edible portion is a tad gelatinous.
Yet, as one food professional remarked to me today: "It's one of those foods you think you should like, until you taste it."
With those words, I decided to pass these fruits by.