Hail to the Chef is the meta-achievement for the secondary skill cooking. You will need to acquire a fair amount of fish as well as meat and other food reagents (such as fruit and alcohol) to complete this achievement. Also much world travel to vendors across classic WoW, Outland and Northrend will be required, as well as completion of many Dalarandaily cooking quests.
Darkmoon Faire starts June 2, 2013 on Darkmoon Island and ends June 8, 2013 (so help us update any new info)! But it will be back at the beginning of next month!