Chefs Erling Wu-Bower of Chicago’s Nico Osteria and Cosmo Goss of The Publican are two of the biggest young stars on the city’s and nation’s restaurant scene. So when they went to their boss at the hugely successful One Off Hospitality Group — James Beard Award winning chef Paul Kahan — a few months ago to tell him that they planned to open their own restaurant, Paul says, “Man, my brain exploded.” But Paul himself had benefited from the nurturing and encouragement of the chefs from whom he learned, such as Rick Bayless, and he and his business partners are helping Erling and Cosmo plan and develop their restaurant. All three chefs will participate on Sunday in the Frontera 30th Anniversary Celebration fundraiser at The Art Institute of Chicago.