The author of "The Sharper Your Knife" tells the inspiring story of how she helped nine others find their inner cook. After graduating from Le Cordon Bleu in Paris, writer Kathleen Flinn returned with no idea what to do next, until one day at a supermarket she watched a woman loading her cart with ultraprocessed foods. Flinn's "chefternal" instinct kicked in: she persuaded the stranger to reload with fresh foods, offering her simple recipes for healthy,...