Basically, every page is a picture of the pizza with a vegetable with the following dialog:
"Hello Green Bean,
Green Bean, my name is Cheeza, not Pizza."
That's on par with a lot of books for kids in the 2-3 year range. Typically printed on cardboard. Done properly, not a bad way to introduce new foods.
Kinda funny to think, though, that there's a subtler message to the story. The Cheeza is essentially teaching the lesson of "respect people's pronouns of choice, rather than the ones you first assume visually". Ironic, given nuTSRs history.