Your only clue is this image:
Is it a sea urchin? A tribble? Scrotum of the Red Howler Monkey?
Answer below the fold.
It’s rambutan, a lychee-like fruit from Thailand. Our local supermarket started carrying them, so of course I had to try a few. They’re sweeter than lychees but more difficult to peel.
Now if only they would carry star fruit, I could make a truly kick-ass fruit salad.
D.