Complete five daily quests with your orphan out.
REMEMBER TO MAKE CERTAIN THAT YOU HAVE YOUR ORPHAN SUMMONED! I've goofed this up so many times over the years it's not even amusing.
The requisite five daily quests do not need to be completed in the same day. Daily quests are denoted with blue exclamation marks instead of the normal yellow.
This is easy for even low-level characters to accomplish as long as they have at least a skill level of 75 in Cooking and Fishing (in and of itself easy to accomplish if you put a bit of time into it). Pick up, complete, and turn in a faction city's daily quests for the Cooking and Fishing professions.
For higher-level characters, seek out an NPC faction hub, for example: Isle of Quel'Danas, or Wyrmrest Temple in Dragonblight. (Pandaria also has daily quest hubs, like on Isle of Thunder, but I figure that I'd suggest content that hasn't recently been done ad nauseam.)