While plums can be found in stores throughout the year, in celebration of plum season I want to share a traditional German plum cake with you.  Depending on which region of Germany you're in, it's called Zwetschgenkuchen, Zwetschgendatschi, Quetschekuche or Pflaumenkuchen.  I know, they're all tongue-twisters :) Variations exist throughout Germany where some versions are