puff pastry dessert recipe

#### Ingredients: - **2 sheets puff pastry** (thawed if frozen) - **2 large apples** (peeled, cored, and diced) - **1/4 cup granulated sugar** - **1 tablespoon lemon juice** - **1 teaspoon ground cinnamon** - **1/4 teaspoon ground nutmeg** - **1 tablespoon all-purpose flour** - **1 egg** (beaten, for egg wash) - **Powdered sugar** (for dusting, optional)