3-ounces sugar-free lime gelatin
1/4 cup boiling water
3 cartons (6 ounces each) key lime yogurt
6 ounces low fat cool whip
1 graham cracker pie crust
1/4 cup boiling
Mix gelatin and boiling water until disolved. Wait five minutes. Add the yogurt and mix well. Add the whipped topping and mix well. Pour into the pie crust and refrigerate for four hours.
Note: You can also substitute strawberry or raspberry yogurt and lemon gelatin with lemon chiffon yogurt.