If Aaron Spelling decided to film a new youth-oriented series in an upscale Midwestern restaurant, he'd have to hire an actor who looked as sexy, muscular and clean-cut as the Capital Grille's Michigan-born Ray Comisky. A graduate of Johnson & Wales University, Comisky has, at age 33, garnered more culinary awards than many of his older, less-buff, local contemporaries, who don't work out in their own home gyms five days a week. The secret of looking so fit while surrounded by a kitchen full of beefsteak? "I don't eat the food I cook," says Comisky, who has the boyish good looks (and cleft chin) of Ben Affleck. But then he confesses that he does eat steak "almost every day." It doesn't hurt that Comisky is surrounded by a serving staff of attractive, poised young waiters and waitresses who also, come to think of it, would be perfectly cast in that new TV series.