The Rokk in Lower City has asked you collect 15 Mana Berries from the Eco-Domes in Netherstorm.
Wouldn't you know it, I think my foodstuffs are up to date and someone comes along and requests the unusual: Mana Berry Delight.
Unfortunately, mana berries are only found in the eco-domes of Netherstorm. Just don't bother looking around Stormspire--it's picked clean.
I could only trust someone trained in the culinary arts to pick the best berries, so don't let me down!