Rachael's in shock when she finds out who the mystery taster is ... Brooke Shields! But soon it's Brooke who's in for a surprise when she gets an impromptu cooking lesson from Rach! "I lack confidence in the kitchen," the star admits, before learning to prepare a 15 minute meal, Chicken Parm Soup. She also tells Rach about her work for a great charity -- Toys for Tots.