An expression signifying that one is especially proud of a batch of food that they have prepared.
A metaphor, likely originating from the fact that the foot is thought of as
dirty, and dirt may equal seasoning, and the
toe was used to add this
extra "seasoning" to food. Nobody, of course, literally put their toe into a batch of food; this expression is purely metaphorical to my knowledge.
Grandson: "Grandmama, this mac 'n
cheese taste
good."
Grandma: "
Mhm, I stirred it with my big toe!"
Grandson: "Huh?"