http://papermariorta.wikia.com/wiki/Chapter_5_(TTYD)_EN
Go to Post Chapter 5 Keelhaul Key/Rogueport. Is it possible to make a Trial Stew with that combination? Also, post any alternative combinations to other recipes that you know of but most others might not.
On that note Miles, It is easier to hunt Life Shrooms from Hyper (insert correct Goomba type) and Shroom Steak can be made with a Turtley Leaf, which means a Zess Deluxe is practically free (See Miles' Recipes Video for more info).

It doesn't confirm whether a Trial Stew can be made with a Thunder Rage and Thunder Bolt or not...

Deleted all my files past CH4, so... yeah... that might take a while...

EDIT: Here's an interesting one... In Super Paper Mario, Mixing an Ultra Shroom Shake with a Honey Jar results in a Honey Super... Looks like they didn't want you to lose all your money...
Also, Sleepy Sheep sell for more at Downtown of Crag, Whereas they sell for 2 coins less at Yold Town. But Yold Town still pays more for Gold Bars and X3s.