Rachel Cunningham in a cooking lesson.Rachel CunninghamRachel Cunningham has cooked on superyachts in Asia, in the Caribbean, and in the Mediterranean.The superyachts she works on feature submarines, spas, helipads, and even video-editing suites.She's cooked for the Formula 1 champion Niki Lauda, Pharrell Williams, politicians, and royalty.This as-told-to essay is based on a conversation with Rachel Cunningham, a 38-year-old superyacht chef and the founder of thesuperyachtchef.com.