HEAT oven to 400°F.
BEAT eggs and water in shallow dish. Mix coating mix and nuts in separate shallow dish. Dip chicken in eggs, then in coating mixture, turning to evenly coat both sides of each breast. Place in single layer on foil-covered baking sheet.
BAKE 18 to 20 min. or until chicken is done (165ºF). Meanwhile, mix dressing and mustard.
SERVE chicken topped with dressing mixture.