Preheat oven to 450°
Roll out pie crust on a lightly floured surface.
Using a 3-3½ inch diameter cutter or cup, cut 8-9 circles. Use fork to crimp sides (optional).
Place pie crust rounds on the underside of a mini muffin tin. Gently press against the tins to form cup shapes.
Bake for 8-10 minutes or until golden brown. Allow to cool completely.
Mix Greek yogurt, Cool Whip and chopped strawberries.
Fill mini pie crusts with mixture.
Freeze for 20-30 minutes. Top with sliced strawberries and serve.
Store in freezer. If frozen solid, allow mini pies to thaw for 5-10 minutes before serving.