1 (3 oz.) pkg. lime gelatin (sugar-free)
2 cartons (6 oz.) Yoplait Key lime light fat-free yogurt
1 (8 oz.) carton frozen lite whipped topping, thawed
1 Keebler reduced fat graham cracker crust (9-inches)

In bowl, combine gelatin powder and yogurt. Fold in whipped topping. Spread into crust. Refrigerate at least 20 minutes.