Answer:
This food is a Thanksgiving tradition.
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
What starts out in a field and then crashed on a stone. It becomes much more when to the fire it's thrown?
What is eaten by man, served among many, grown by many, and white as snow?
The leaves are on the fruit, the fruit on the leaves. What is it?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.