Prepare and bake crust in 9-inch pie plate as directed on package for 1-crust baked shell. Cool.
Microwave 5 oz. chocolate and milk in medium microwaveable bowl on HIGH 2 min. or until chocolate is almost melted, stirring after 1 min. Stir until completely melted. Cool to room temperature.
Beat cream cheese, sugar and zest with mixer until well blended.
Add to chocolate mixture; beat with whisk until well blended. Stir in COOL WHIP; spoon into crust. Top with berries.
Melt remaining chocolate as directed on package; drizzle over berries. Refrigerate 1 hour.