Chocolate Sponge 4 eggs 3/4 cup caster sugar 1/2 cup corn flour 1/2 cup custard powder 1 teaspoon cream tartar 1/2 teaspoon bicarbonate soda 1 1/2 tablespoon cocoa powder Filling 650 g jar morello cherries 2 tbs caster sugar 1 tbs cornflour 600 ml cream ΒΌ cup grenadine 200g dark chocolate (I used a huge …