Worst Case of Pasketti-Itis

Pasta is the perfect food with so many different varieties. Why should Petunia eat anything else? Her mother, her teacher, and even the lunch-lady warn that she might turn into pasta if she doesn't try something new. Could she really turn into pasta? Would it be farfalle? Or maybe fettuccini? Petunia finds out, to her dismay, that "you are what you eat."