Read "The Extraordinary Science of Addictive Junk Food" and answer:
What other healthy foods could be similarly transformed? Beets, Kale? what else?
Write an essay proposing such a product. Use the "they say/I say" format. Perhaps quoting or summarizing something said in Moss's essays as your "they say". Some of the topics ask for you to relate a personal narrative. Some require research; most just ask that you reflect on a specific aspect of the subject.