Step 1

Add 3/4 cup boiling water to lime gelatin mix in medium bowl; stir 2 min. until completely dissolved. Add ice; stir until gelatin is slightly thickened. Remove any unmelted ice. Pour gelatin into 1- to 1-1/2-qt. bowl. Refrigerate 15 min. or until set but not firm.

Step 2

Add remaining boiling water to strawberry gelatin mix in large bowl; stir 2 min. until completely dissolved. Add 2/3 of the COOL WHIP; stir with whisk until COOL WHIP is melted and mixture is blended. Refrigerate remaining COOL WHIP for later use. Carefully spoon strawberry gelatin mixture over lime layer.

Step 3

Refrigerate 2 hours or until set. Top with remaining COOL WHIP just before serving.