1 box (3 oz) sugar-free lime flavored gelatin
1/4 c. boiling water
2 containers (8 oz. each) key-lime pie flavor light yogurt
1 container (8 oz.) frozen fat-free Cool Whip
1 (9 inch) baked pie crust or 1 (9 inch) reduced-fat graham cracker pie crust

In a large bowl, dissolve gelatin in boiling water. With wire whisk, stir in yogurt and fold in Cool Whip. Pour mixture into prepared crust. Refrigerate overnight or at least 2 hours. (3 points or 148 calories per slice.) This is good, too, made with strawberry jello.