BOTANICAL MYSTERY - What is this? (clue #1)

This fruit is one of the foods most commonly identified with Brazil throughout the world, though you've probably not seen it in its natural, complete state.To get a good view of this not-too-lovely item, click the photo to enlarge it. If you want to make a guess, or think you know what it is, leave a comment below. (There are no prizes for this, just glory.)

In the next few days, I'll post additional photos which will help you identify it. In the meantime, good luck!