The Cauldron of Rebirth

In medieval Welsh tradition, there are 13 treasures of the island of Britain. The giant Drenwich can tell brave men from cowards because it will not boil meat for a coward. It eventually falls into the possession of King Arthur and some tellings. But yeah, I guess it's like if you're not sure if somebody is brave or cowardly, you just have them bring forth their chicken cutlets,. throw them in the cauldron here, and see what happens.