A woman, a chicken dinner, a million dollars-and a romp through the heartland of America's competitive cooking culture. When Ellie Mathews entered her Salsa Couscous Chicken in the venerable Pillsbury Bake-Off, she never imagined she'd win the grand prize. Immediately after Alex Trebek announced that her dish had won a million dollars, she was thrown into the limelight. Booked with Oprah and Rosie-even photographed for the "New York Times" in a vest...