Summer Lime Pie
["1 (3 oz.) pkg. Jell-O lime gelatin", "2/3 c. boiling water", "1/2 tsp. grated lime juice", "1/2 c. cold water (ice cubes)", "1 (8 oz.) Cool Whip", "1 prepared graham cracker crumb crust (6 oz.)", "lime slices, cut into quarters (optional)"]
["Dissolve gelatin completely in boiling water in large bowl. Stir in lime peel and juice.", "Mix cold water and ice to make 1 1/4 cups.", "Add to gelatin, stirring until ice is melted.", "Stir in whipped topping with wire whisk until smooth.", "Refrigerate 10 to 15 minutes or until mixture is very thick and will mound.", "Spoon into crust.", "Refrigerate 2 hours or until firm.", "Garnish with additional whipped topping and lime slices.", "Store leftover pie in refrigerator.", "Serves 8."]
["lime gelatin", "boiling water", "lime juice", "cold water", "graham cracker crumb crust", "lime slices"]