This page explains how to complete the level 90 post-Endwalker quest "Currying Flavor".
This quest is available if you have completed the quest Gods Revel, Lands Tremble.
Starting the Quest
Talk to Varshahn in Radz-at-Han to begin the quest. There will be a cutscene.
Speak with Zero
Use an Aethernet Shard to go to Mehryde's Meyhane, then go south to the quest icon and talk to Zero.
Select a Spice
Check on the sparkling Selection of Spice. Choose whichever you prefer.
Taste the Spice in Zero's Presence
While standing near Zero, use the Bag of Spice from the Key Items section of your inventory, or you can use the icon to the right of the quest name in your list of active quests.
Speak with Zero Again
Go northwest, then northeast, then east through the door, to the quest icon on the map. Talk to Zero to proceed. There will be a cutscene. You will have the temporary status enhancement "Spicy Circulation".
Speak with the Meghaduta Attendant
Use an Aethernet Shard or the main Radz-at-Han Aetheryte to go to Meghaduta, then go north to the quest icon. Talk to the Meghaduta Attendant to complete the quest. Say Yes and there will be a cutscene.
Next Main Scenario Quest
After you complete the quest, talk to Urianger to accept the next quest: Going Haam.