Pistachio-Studded Peach Galette

Ingredients

• Galette Dough
• 1⅓ cups (175g) all-purpose flour
• 1 cup plus 1 tablespoon (125g) whole wheat flour
• Zest of ½ an orange
• ½ teaspoon salt
• 12 tablespoons (170g) unsalted butter
• 1 egg yolk
• 1 teaspoon apple cider vinegar
• ¼ cup (60g) ice water, plus more as needed
• Filling
• 3⅓ cups (565g) peaches, peeled and sliced ½-inch thick
• ⅓ cup (30g) almond flour
• Scant 2 cups (235g) unsulfured dried Turkish apricots, chopped
• Pinch of ground nutmeg
• Assembly
• 1 egg white
• ⅓ cup (40g) pistachios, chopped
• Whipped cream or ice cream, for serving (optional)
• Apricot jam, warmed, for glazing (optional)