Rutabaga the Adventure Chef: Book 2: Feasts of Fury

Rutabaga the Adventure Chef: Book 2: Feasts of Fury — page 7
Wow This is wonderful So creative too You're the real deal eh You bet I am I've cooked for kings strange beasts and even a god My uncle liked to cook He'd always be making something delicious in the kitchen He even let me help out a few times Oh yeah Hey watch it with that MUNCH MUNCH In fact I remember a soup that he used to make that was just amazing It was his signature dish That's the thing The soup was a standard broth but after adding a secret ingredient the flavor would completely change It'd go from simple to sublime A unique flavor that just filled your mouth Gosh It's been close to 30 years since I've eaten it Wow what was in it I don't remember WELL What's the secret ingredient