1Heat oven to 350°F. Spray bottom only of 15x10x1- or 13x9-inch pan with cooking spray. In large bowl, stir cookie mix, butter and egg until soft dough forms. Press evenly in bottom of pan. Bake 15 to 20 minutes or until light golden brown. Cool completely, about 30 minutes.
2In small microwavable bowl, microwave baking chips uncovered on High 45 to 60 seconds or until chips are melted and can be stirred smooth. In medium bowl, beat cream cheese with electric mixer on medium speed until smooth. Stir in melted chips until blended. Spread mixture over crust. Refrigerate while making topping.
3In small bowl, crush 1 cup of the strawberries. In 2-quart saucepan, mix sugar and cornstarch. Stir in crushed strawberries and 1/3 cup water. Cook over medium heat, stirring constantly, until mixture boils and thickens. Stir in food color. Cool 10 minutes. Gently stir in remaining 3 cups strawberries. Spoon topping over filling. Refrigerate 1 hour or until set; serve within 4 hours. Store covered in refrigerator.