Apple and Prune Tart

Name: Apple and Prune Tart
Ingredients: 1 2/3 cups all-purpose flour; 1 1/2 teaspoons sugar; 3/4 teaspoon salt; 1 1/4 sticks cold unsalted butter, cut into pieces; 4 to 5 tablespoons ice water; 1/3 cup water; 2 tablespoons Calvados; 1 cup packed pitted prunes (7 oz), halved; 1 teaspoon cinnamon; Pinch of ground cloves; 5 tablespoons all-purpose flour; 3/4 cup sugar; 2 pounds tart green apples (5); 1 1/2 tablespoons fresh lemon juice; 1/2 cup walnut pieces, toasted; 1 tablespoon whole milk; 1 tablespoon sugar