Alex Hitz is the creator of the gourmet frozen-food line Beverly Hills Kitchen. He has appeared on QVC and HSN, where his show earned the No. 1 slot in the kitchen-and-food category. Hitz is also a prominent New York man-about-town and philanthropist, with home bases also in L.A. and in Atlanta, his birthplace. His first cookbook, My Beverly Hills Kitchen, will be released this month. To prepare for this interview, the author made a batch of Hitz’s Best Ever Brownies from the