Sweet Potato Meringue Pie

Ingredients

• 2 large sweet potatoes
• 1 cup Sour cream
• 1 cup granulated sugar
• 3 large eggs
• 2 tablespoons unsalted butter
• 2 tablespoons bourbon
• 1 teaspoon vanilla
• 1/2 teaspoon ground ginger
• 1/4 teaspoon Ground nutmeg
• 1/4 teaspoon salt
• All-purpose flour for dusting
• 1 Basic Flaky Single Piecrust
• 1/2 of a 15-ounce package rolled refrigerated unbaked piecrusts 1 crust
• 1/4 teaspoon cream of tartar
• 1/2 cup superfine sugar