A lot of the thief-class did this.
They look at trees and shrubs here and there, plucking off fruits and leaves, then saving it for later.
They didn't use them just for cooking.
There are monsters that don't like the strong smell of herbs and fruits.
In case of emergencies, they can be used like insect repellent.
When made into a powder, it can be used to blind them as well.
"I like your particular way of seasoning."
"Well, thanks.