Soup
this was the colloquial term used by members of the Anzat race to describe the life energies contained in a being's brain. A being's "soup" contained memories of all of their life experiences. When a being died, their "soup" ascended into the stars was lost, although it was believed that the life energies of an Anzat became part of the Sea of Memory. Over time, the Anzati discovered that they could actually taste this "soup" when they consumed the brains of their victims. Note that Star Wars Gamer magazine, issue 1, indicates that the essence is actually called "luck", while "soup" was the medium through which the "luck" could be consumed.