Phyllo Dough Apple Turnovers

Name: Phyllo Dough Apple Turnovers
Prep time: 45 min
Cook time: 21 min
Total time: 1 h 6 min
Cuisine: American
Ingredients: ½ cup unsalted butter (melted, divided); 3 medium apples (peeled, cored, diced into ½ inch pieces); ⅓ cup plus 1 tablespoon brown sugar (light or brown, packed); 1¼ teaspoon cinnamon; ¼ teaspoon ground nutmeg; 1 teaspoon fresh ginger* (grated on a microplane or box grater); ½ teaspoon salt; 1 tablespoon fresh lemon juice; 1 teaspoon vanilla extract; 1 tablespoon cornstarch; 1 tablespoon cold water; 6 sheets phyllo dough; powdered sugar (optional, for serving)