Which Prometheus's organ was eaten by the eagle as a punishment for his theft of fire?

Prometheus warned his brother, Epimetheus, not to accept any gifts from Zeus, but bro forgot the warning when the Big Z presented him with Pandora, the first mortal woman, created for the purpose of getting revenge on Prometheus. From some of the images of hér, I can't blame Epimetheus for being snookered - she was a beauty. We all know the rest of the story about the jar. For some reason until reading this the other day, after another question about Prometheus, the parallels between Pandora and Eve had never occurred to me.

...with some fava beans and a nice chianti...

FreshMango, Zeus not father. His parents are Iapetus and Clymene.

Verandton, his liver

Which of Prometheus's organs...