Mix yogurt and Cool Whip together in a large bowl. NOTE: If you are using Plain yogurt and it isn't sweet enough, you can also add 2 Tbsp. of honey to sweeten things up, or a package (1 tsp.) of artificial sweetener.
You have options: 1. Pour mixture in the pre-made pie crust or 2. mix in 1/2 of the fruit, then pour into the pre-made pie crust.
Top with fruit. You can decorate however you like.
Turn the factory lid from the pie crust over so it creates a dome and seal over pie using the edge of the aluminum bowl the crust came in. Place in freezer for a minimum of 2 hours or until ready to serve. If you take it out to thaw before serving, don't wait to long or the yogurt/CoolWhip mixture gets soupy.