In a microwave safe bowl, break up symphony bar into smaller pieces and melt in microwave. I prefer to only cook it for 30 seconds or less and then stir. You don't want ot burn the chocolate.
Once melted fold in Whipped Topping
Pour into prepared gram cracker pie crust.
Place in Freezer for 2 hours to set up. Remove from freezer 15 minutes prior to serving.