Now that you have procured the second ingredient, U'odh Nunh sends you back to Wheiskaet with a delivery.
This quest is available if you have completed the quest When the Worm Turns.
Starting the Quest
Talk to U'odh Nunh in the Forgotten Springs in Southern Thanalan. to begin the quest.
Deliver the Onyx Brandewine
Go back to Eastern La Noscea, make sure you are on the eastern side of the area, and talk to Wheiskaet to hand over the brandewine complete the quest.
Next Main Scenario Quest
After you complete the quest, you will need to be at least level 32 to proceed to the next quest. After you reach level 32, talk to Wheiskaet to accept the next quest: The Things We Do for Cheese.