Dried Plum Tart and Balsamic Vinegar Tart / Crostata di Prugne al Balsamico | Ciao Italia

Ingredients

• Pastry Crust
• 1 1/2 cups flour
• Pinch of salt
• 1/2 cup cold unsalted butter, grated
• 1/2 cup sugar
• 1 teaspoon baking powder
• 1 large egg, lightly beaten
• 1 teaspoon vanilla extract
• Filling
• ​One 18-ounce box pitted dried plums or prunes
• 4 cups balsamic vinegar
• 1/4 cup brown sugar
• 1/4 teaspoon salt
• Grated zest of one large orange
• 2 tablespoons coarse white sugar