Fruit and Whipped Cream Triple Layer Sponge Cake Recipe

INGREDIENTS for sponge cake 1 cup egg whites and ½ cup yolks, about 6 small eggs 1 cup golden caster sugar 1 cup plain flour pinch of salt 1¼ tsp baking powder 1-2 tbs unsalted butter (softened) for layers 800g (less if not used for decoration) strawberries, blueberries and green seedless grapes or other fruits of your choice (washed, drained and hulled, sliced) 6 tbs jam of your choice (I used apricot jam) 750 ml whipping cream 1¼ cup golden caster sugar 1-2 tsp of food colouing - optional (...)