Forgive my ignorance, but I did a search on the origins of this phrase in regards to food and none were satisfactory to me.
I don't recall hearing this phrase while growing up, and now when I hear it, it brings odd imagery to mind that does not connect with eating food. "Tucking in", to me, is something you do to a child's blankie before saying goodnight, or something you do to the corners of a bedsheet, or the tail of your shirt.
How/when did "tuck" become associated with food, does anyone know?
I can't believe I ate the whole thing!