Unlike the other one where you stand somewhere to avoid damage, this one you need to dedicate someone to the job of eating bad food.
1. Pick a person for the selected job (tank is best if he has no dps spec)
2. Have that person mount up before the fight
4. Engage cookie!!!
3. Eat all the bad food.
When you mount up, you do not take ANY damage from eating the bad food as well as not getting the debuff.
First contribute =D and i found this completely on accident.