Answer:
You throw away my outside you cook my inside. Then you eat my outside and you throw away my inside.
I am a lunch money thief
you can throw me away but I will always be coming back
I am black and white. I have strings I have keys. I make sound without my lips. I make dough with no flour
What has to be broken before you can use it?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.