Arriving in game on August 27, 2019.
From the article:
When you reach cooking level 425, Sous-Chef Seimur Oxbone will contact you to check on your progress. Impress him with your skills and he’ll happily write you a letter of recommendation, sending you off on a journey to study with master chefs in every capital city.
While you’re leveling your cooking skill, you’ll also graduate to a better class of tools and raw ingredients. Each instructor will help you obtain what you need, from a cutting-edge oven to high-quality meat and garden-fresh herbs.