Preheat oven to 400°F. Add water to stuffing mix; stir just until moistened. Place 2 chicken breasts in large freezer-weight resealable plastic bag. Pound chicken with the side of a heavy can, rolling pin or meat mallet until chicken is 1/4-inch thick. Repeat with remaining 4 chicken breasts, adding to bag two at a time. Place chicken, top-sides down, on large cutting board; spread evenly with stuffing mixture. Starting at one of the short ends, tightly roll up each chicken breast. Moisten chicken with water; roll in coating mix until evenly coated on all sides.