In large bowl, stir together 1 1/2 cups sugar, the cornstarch, tapioca and salt; gently toss with berries. Let stand 15 minutes. Spoon into crust-lined pan. To make lattice top, cut second crust into 1/2-inch wide strips. Arrange strips in lattice design over filling. Trim and seal edges. Brush crust with milk; sprinkle with 2 teaspoons sugar.