2 (8 oz.) containers strawberry yogurt
1 (8 oz.) carton Cool Whip
1/2 c. mashed strawberries
1 (8 or 9 inch) graham cracker crust

Thoroughly combine mashed fruit and yogurt in a bowl. Fold in whipped topping, blending well. Spoon into crust and freeze, about 4 hours. Remove from freezer and place in refrigerator 30 minutes before serving. Store leftover pie in the freeze.