Pimms Cup Sponge Cake

Name: Pimm's Cup Sponge Cake
Ingredients: Pimm's Cup Fruit Salad; 1/2 cup blueberries; 1/2 cup strawberries, sliced; 2 tangerines, quartered; 2 tablespoons Pimm's; 1 tablespoon honey; 1/2 teaspoon lemon juice; Dash of ground ginger; Cake; 12-13 egg whites (430g); 2 tablespoons vanilla extract; 1 1/2 teaspoons cream of tartar; 1 teaspoon lemon juice; 1/2 teaspoon salt; Zest of two tangerines or one large orange; Zest of a large lemon; 1 1/2 cups granulated sugar; 1 cup cake flour; 3-4 cups whipped cream, plain or coconut; Fresh mint leaves, for decoration