1 egg
1 can (16 oz.) pumpkin
3/4 c. sugar
2 tsp. pumpkin pie spice
1/4 tsp. salt
3 1/2 c. thawed Cool Whip
1 prepared 9" graham cracker crumb crust

Beat egg slightly in large bowl. Blend in pumpkin, sugar, spice, salt and whipped topping. Spoon into crust. Freeze until firm, about 4-6 hours or overnight. Garnish, if desired.