From a cooking school founded in a New York apartment in 1977, the late Dr. Annemarie Colbin’s Natural Gourmet Institute mushroomed into a Flatiron District complex of kitchens and lecture rooms. Wellness-minded instructors guide students pursuing food industry careers and amateurs with plant-based interests. Missions include transitioning from vegetarian to vegan, finding culinary approaches to curing migraines and crafting healthy party hors d’oeuvres.