Answer:
I'm a type of pizza that is folded in half before cooking to contain a filling
The land was white the seed was black it'll take a good scholar to riddle me that. What is it?
My voice is tender, my waist is slender and I'm often invited to play. Yet wherever I go, I must take my bow or else I have nothing to say.
Not born, but from a Mother's body drawn. I hang until half of me is gone. I sleep in a cave until I grow old. Then valued for my hardened gold.
Come up and let us go. Go down and here we stay.
You use it between your head and your toes, the more it works the thinner it grows.