Spiced Sweet Potato Pie

Ingredients

• 2 large egg whites
• 1 large egg
• 1-3/4 cups mashed sweet potatoes
• 1/2 cup 2% milk
• 1/4 cup reduced-fat butter, melted
• 1 tablespoon bourbon
• 1-1/2 teaspoons vanilla extract
• 2/3 cup packed brown sugar
• 1 tablespoon all-purpose flour
• 1 teaspoon ground cinnamon
• 1/2 teaspoon salt
• 1/2 teaspoon ground nutmeg
• 1/4 teaspoon ground cloves
• 1 reduced-fat graham cracker crust (9 inches)
• 1/2 cup fat-free whipped topping