A Requested Recipe: Fast, Easy, Delicious

"Help!" a friend of a friend wrote.  "I've lost the recipe for an easy cake printed in one of the last issues of Gourmet."

She said the cover was a beautiful apple (actually, it was a beautiful quince).  A group of us scrambled around, trying to find it.  And here it is.  

You could make this with just about any fruit.  Hard to think of a better way to spend fifteen minutes.