what's the meaning of "the last curve of chocolate"?

The person is eating a filled chocolate desert. Inside the chocolate is a center of marshmallow and fruit. He is peeling away the chocolate, and he has just peeled off the "last curve".

Engineer is right, this is just a picture of a similar desert, notice that it has very few straight lines.

No fruit in British ones, only jam!

http://t2.gstatic.com/images?q=tbn:ANd9GcSfMjiq6X2ACwVlEJ8KrumSbomabk-xdZ1jnrlz3cB4raSdoHQie7Ppdy1TLg

Thank you very much!