To some food, you could add some nutrition or confort just like farmer's delight, or create new effects, or use regeneration in some, doing some effects of golden apple in some i think, giving resistance too, giving some effects. :p
(idea)

Any examples cause I have many that have those.

some foods that can be eaten even full (is there some?)

most of the candy items can be, theres a few others i cant think of off the top of my head.