Brown Butter Sweet Potato Pie

Name: Brown Butter Sweet Potato Pie
Ingredients: 1 ¼ cups all-purpose flour; 1 cup whole-wheat pastry flour; ¼ teaspoon salt; 12 tablespoons (1 1/2 sticks) cold unsalted butter, cut into chunks; ½ cup reduced-fat plain Greek yogurt; 4 tablespoons ice water; 2 medium sweet potatoes (about 1 1/4 pounds); 2 tablespoons unsalted butter; ½ teaspoon ground cardamom; ½ teaspoon ground cinnamon; ½ teaspoon salt; ¼ teaspoon ground white pepper; 2 large eggs; 1 (14 ounce) can sweetened condensed milk; 2 teaspoons lemon zest; 1 teaspoon lemon juice