Travel to Gadgetzan in the Tanaris desert and speak with Dirge Quikcleave about advancing your cooking career.
How you expect Zamja teach you anything? You got all of Zamja's cooking mojo and still you crave more!
Zamja can't help. Fat <race> needs to go to Gadgetzan. You find a little goblin named Dirge there - he help you, fatty.
When you become big cook on the block, you come back and teach Zamja, ok? Now go!