White Balsamic Custard Tart with Fresh Berry Topping

Name: White Balsamic Custard Tart with Fresh Berry Topping
Ingredients: 1 1/4 cups all purpose flour; 3 tablespoons sugar; 1/4 teaspoon salt; 1/2 cup (1 stick) chilled unsalted butter, cut into 1/2-inch cubes; 1 large egg yolk; 1 tablespoon whipping cream; 1/2 cup whipping cream; 2 tablespoons cornstarch; 2 large eggs; 4 large egg yolks; 1 teaspoon vanilla extract; 1/2 cup white balsamic vinegar; 3/4 cup water; 3/4 cup sugar; 1/4 cup (1/2 stick) unsalted butter; 2 large strawberries, hulled, sliced; 2 1/2-pint containers blueberries; 1 1/2-pint container raspberries