1Make cake as directed on package, using cold water. Cool cake completely.(I make this the day before).
Cut cake into 3 layers. Place bottom layer, cut side up , on serving plate.Set aside.
2In a large bowl, beat milk, lime juice and lime peel with wire whisk until smooth and thickened. Fold in whipped topping.
Spread 1 cup lime mixture evenly over top of first layer of cake on plate.
Place second layer of cake carefully on bottom layer; spread evenly with 1 cup lime mixture. Top with remaining layer of cake.
Frost top and side of cake with remaining mixture. Sprinkle coconut. Garnish cake servings with kiwifruit and strawberries . Refrigerate any leftovers.