Seamus Mullen, an award-winning New York City chef who changed his approach to cooking after receiving a diagnosis of rheumatoid arthritis, is the next chef on L’Atelier de Le Creuset’s event schedule. Mullen will conduct a cooking demo on May 28 at 6 p.m. The $50 registration fee includes a copy of his 2012 book, Hero Food: How Cooking With Delicious Things Can Make Us Feel Better. To purchase tickets, visit