Book excerpt: Growing up in Southern Arizona helped form Chef Ryan Clark's brand of cuisine. You take a young, three-time Tucson Iron Chef winner and surround him with the best the Southwest has to offer and voila! you get Modern Southwest Cooking. Innovative recipes include Prickly Pear Mojito, Yam and Ginger-Jalapeno Pave, California Halibut and Sauteed Succotash, Hanger Steak Chimichurri, and Habanero Creme Brulee.