1. In bowl, with electric mixer on low, combine whipped-topping mix and cold milk. Increase speed to high and beat 4 minutes. In large bowl, whisk together sweetened condensed milk, lemon juice, and lemon peel. Whisk in whipped topping. Blend in yellow food coloring. Pour mixture into crust and freeze. Flip the plastic cover from packaging for a lid. Garnish with Cool Whip and fruit slices.