Pastry for single-crust pie (9 inches)
1/2 cup chopped walnuts
1/4 cup caramel ice cream topping, warmed
3 eggs
1 cup mashed sweet potato
1 cup apple butter
3/4 cup packed brown sugar
1 cup evaporated milk
1 teaspoon Spice Islands® pure vanilla extract
1/2 teaspoon salt
1/2 teaspoon ground cinnamon
1/4 teaspoon ground ginger
1/8 teaspoon ground allspice
Whipped cream and additional caramel ice cream topping