New York chef and cookbook author, Zarela Martinez was hosted by the chef and owner of Dallas’ upscale Stephan Pyles restaurant. No sooner had Mr. Pyles introduced the woman who was among the first chefs to bring authentic regional Mexican cuisine to Manhattan than she announced with her trademark directness, “I have to tell you something. A lot of things have happened in the last 15 years since I taught here…I’ve developed Parkinson’s. If you don’t understand something I said, please tell me. I’m not embarrassed, and I don’t feel bad about it.”