Beat cream cheese and powdered sugar together. Fold in whipped cream. Smooth into pie crust that has been baked in tart pan (or pizza pan).
Fresh Boysenberry Topping: Mix 1 quart boysenberries with 1 Cup Sugar and 3 Tablespoons Cornstarch. Cook until thickened. I do this in the microwave on high for about 12 minutes. Watch carefully and stir every 4 minutes. Cool and spread on filling.
Fresh Strawberry Topping: Mix 1 Cup Water with 1 Cup Sugar and 2 Tablespoons Cornstarch. Cook until thickened. Add red food coloring. Fold fresh berries cut in half into the mixture when it is cool. Spread over cream cheese filling.