Frozen No-Bake Pumpkin Pie

1 (5 ounce) package instant vanilla pudding mix

1 (15 ounce) can pumpkin

1 cup milk

½ teaspoon ground nutmeg

½ teaspoon ground ginger

½ teaspoon ground cinnamon

1 cup frozen whipped topping, thawed

1 (9 inch) prepared graham cracker crust

In a medium bowl, combine pudding, pumpkin, milk, nutmeg, ginger, and cinnamon. Mix slowly for about 1 minute. Fold whipped topping into the mixture then spoon entire mixture into pie shell. Freeze until firm (about 4 hours). Let stand at room temperature for about 10 minutes before slicing.