Can you tell me what book this is?

I read a book quite awhile ago, and want to find it again but I have very few details about it, and no title or author... These are the details I remember: The main character is a boy, who is in a prison of some sort. The only way to make food is by usuing a magic ball, but if you use it wrong it burns whatever part of you it is touching. The boy can make apples, but only apples because there was always something magical about an apple orchard he was close to as a child. There was also something about a cliff in this prison, and maybe a kite.... I know it's a long shot, but any ideas? Thanks!