PREHEAT oven to 350º F.
MICROWAVE baking bars in medium, uncovered, microwave-safe bowl on MEDIUM-HIGH (70%) power for 1 minute; STIR. If pieces retain some of their shape, microwave at additional 10- to 15-second intervals, stirring just until melted. Cool to room temperature.
BEAT cream cheese in small mixer bowl until smooth. Beat in sour cream, egg and vanilla extract. Gradually beat in melted baking bars. Pour into crust.
BAKE for 30 to 40 minutes or until center is set. Cool completely on wire rack. Refrigerate for 1 hour or until firm. Garnish with fruit.