Today’s Picks: Dueling Chefs, Decadent Mansions, and David Cassidy - blog.simplemistake.com 07/21/2009 David Cassidy gives TV fatherhood a try on Ruby & the Rockits . The Restorer Guy (7 p.m., TLC): This new reality show chronicles the projects of Gable Painter, an expert in home restoration. In the premiere episode, he works on the Grace Street Mansion, a Victorian mansion built in 1895. And, yes, that’s his real name. Hell’s Kitchen (8 p.m., FOX): Get ready for anothe