Summer Fruit Crostata

INGREDIENTS

• 1/2 pint fresh blueberries
• 4 tablespoons (1/2 stick) cold unsalted butter, diced
• 1/2 pound (2 sticks) cold unsalted butter, diced
• 1 tablespoon plus 1/4 cup all-purpose flour, divided
• 2 tablespoons freshly squeezed orange juice
• 6 tablespoons (3 ounces) ice water
• 1/2 teaspoon kosher salt
• 1/4 teaspoon kosher salt
• 1/4 cup granulated or superfine sugar
• 1 tablespoon plus 1/4 cup granulated sugar, divided
• 2 cups all-purpose flour
• 1/4 teaspoon grated orange zest
• 1/2 pound firm ripe black plums, unpeeled
• For the pastry (makes 2 crostatas)
• 1 pound firm ripe peaches, peeled