““As I traveled, I noticed that in every country, whether I was watching home cooks or professional chefs, and whether they were cooking over live fire or on a camp stove, the best cooks looked at the food, not the heat source. I saw how good cooks obeyed sensory cues, rather than timers and thermometers. They listened to the changing sounds of a sizzling sausage, watched the way a simmer becomes a boil, felt how a slow-cooked pork shoulder tightens and then relaxes as hours pass, and tasted a noodle plucked from boiling water to determine whether it’s al dente. In order to cook instinctually, I needed to learn to recognize these signals. I needed to learn how food responds to the fourth element of good cooking: Heat.””