Courtesy of Food Network When it comes to sacrificial lambs, Chef RJ Cooper doesn’t fit the mold of “easy prey.” But tonight at 10 p.m., Cooper will be the first challenger to go up against the Food Network’s newest Iron Chef, Chef Marc Forgione. After winning the third season of the reality contest The Next Iron Chef, Forgione, specializing in modern American cuisine, now joins six other Iron Chefs in Kitchen Stadium. Unfortunately, “Iron…