“My pantry is a very magical and mysterious place,” Padma Lakshmi told me one recent afternoon via a video call. True as that may be, Lakshmi, the former host of Top Chef and Taste the Nation, has made a career of shining a light on what people eat, and how we eat it, precisely to make it less mysterious. Her new cookbook, Padma’s All American, is no exception. In it, Lakshmi takes on the challenge of demystifying what it means to eat like an American, and by extension, how to be one.