Beat egg until foamy. Blend in flour and sugars. Add butter and mix well. Stir in chocolate chips and nuts. Roll sweet dough into a 13-inch circle. Place on a 12-inch pizza pan sprayed with non-stick cooking spray, forming a ridge to hold chocolate filling. Spread evenly over dough. Bake at 350 degrees F for 20 minutes or until golden brown.
Remove from pan and place on wire cooling rack.
When completely cool, spread whipped topping over chocolate chip filling. Arrange fresh fruit on top in a decorative pattern.