All year, Mrs. Q has been eating the same lunch that her students eat. This week on Good Food, this anonymous teacher shares her thoughts on school lunch in the U.S. The potato is a simple food, yet it has had profound implications on many different cultures. John Reader knows the significance of the potato. DJ and songwriter Moby is a longtime vegan. He’s here to talk the ethics of eating. Elizabeth Minchilli takes us on a Roman holiday. We’ll eat mac and cheese with Jonathan Gold. Russ Parsons shares an easy way to make polenta that doesn’t involving arm-numbing stirring. Plus, Kevin Porter explains how solar ovens are possibly the future of cooking. And, DJ Olsen of Lou wine bar is making Spanish tortillas with ingredients from the Santa Monica Farmers Market.