Hard to Stomach is a side quest in the Mark of the Assassin downloadable content for Dragon Age II.
An interesting entry in the cook's journal that might help with contaminating Leopold's food:
"Tried a new seasoning for the crepes this morning. A bunch of lutefisk, a few slices of old cheese, and a lot of navet. Gave the duke the runs all day. Note to self: not so much navet next time."
Acquisition
This quest appears after entering the Chateau Haine Interior from the Chateau Courtyard. There is an alcove in a hallway in the early part of the Chateau where you will find the cook raving. Select the conversation option to mislead the cook out to the gardens, (or if cook runs away) and click on the cook's journal to activate the quest.
Walkthrough
Click on the various food portions to get the proper mixture.
You need:
- 4 lutefisks
- 3 slices of cheese
- 5 navets
Once you mixed the ingredients successfully, you should be able to put it in the wyvern's food and complete the quest.
Result
You also earn 200xp for completing the quest.