Pilgrim's Supplies is available to both the Horde and Alliance during the Pilgrim's Bounty seasonal event. It involves cooking food using ingredients and recipes available during the event, and makes you travel between the event sites near the classic three major cities of your faction.
For each step in the quest you are requested to cook five of the foodstuffs which can be made from the materials available at the location of the quest giver, and take them to the Pilgrim's Bounty site near another city. After having been sent back and forth for a bit, you will get your reward with the final quest.
Along the way you may get XX - YYYY XP