2
Pound chicken to 1/4-inch-thickness on work surface; turn smooth sides down. Mix cream cheese, spinach, 1 cup mozzarella and 3 Tbsp. Parmesan until blended; spread onto chicken. Starting at one short end of each breast, roll up chicken tightly. Secure with wooden toothpicks, if desired.
3
Whisk egg in shallow dish until blended. Combine cracker crumbs and remaining Parmesan in separate shallow dish. Spray 13x9-inch baking dish with cooking spray. Dip chicken, 1 bundle at a time, into egg, then into crumb mixture, turning to evenly coat all sides with crumb mixture. Place, seam sides down, in prepared baking dish.
4
Bake 30 min. or until chicken is done (165ºF). About 5 min. before chicken is done, cook pasta sauce on medium-low heat until heated through, stirring occasionally.
5
Remove and discard toothpicks from chicken. Spoon pasta sauce over chicken; top with remaining mozzarella.