The Dish: Chef Seamus Mullen Chef Seamus Mullen grew up on an organic farm in Vermont where his mother and grandmother provided his first cooking lessons. He worked in some of the top kitchens in Spain before bringing his take on modern Spanish cooking back home and eventually opening the acclaimed Tertulia in New York City. He's also well-known for advocating food choices to promote optimal health, which he credits for relieving his own struggle with rheumatoid arthritis. Mullen joins "CBS This Morning: Saturday" to discuss his culinary journey.