Spiced Pumpkin Chiffon Pie

INGREDIENTS

• All-Purpose Light Piecrust dough
• Cooking spray
• 1 1/4 cups canned pumpkin
• 1/2 cup packed brown sugar
• 3/4 teaspoon ground cinnamon
• 1/2 teaspoon grated lemon rind
• 1/4 teaspoon salt
• 1/8 teaspoon ground nutmeg
• 2 large egg yolks
• 2/3 cup evaporated low-fat milk
• 1 envelope unflavored gelatin
• 1/4 cup fresh orange juice
• 2 large egg whites
• 1/8 teaspoon cream of tartar
• 5 tablespoons granulated sugar, divided
• 3 tablespoons water
• 1/2 cup heavy whipping cream
• 1/2 ounce shaved bittersweet chocolate