Not sure if it's been posted at all, but you can easily follow the ledge on the wall to the other side of the room where Tharbek is seated during the encounter. There's an instance portal back there but an invisible wall blocks you from going any further. I'm sure there's a method of bypassing it, but I couldn't manage to myself.
EDIT: There's an ogre on the other side that I just confirmed drops http://www.wowhead.com/item=111387 The Joy of Draenor Cooking
This might be a big deal, not sure?