Whisk the egg yolks and 80 grams sugar together until the mixture is pale and thickens. Gradually fold the chocolate mixture into the egg yolk mixture. Sift the flour and a dash of salt together over the mixture and gently fold these in, too.

Beat the egg whites in a medium bowl untill stiff peaks form. Fold in the 100 grams strawberries and white eggs mixture over the egg yolks chocolate mixture. Give everything a good final mix and pour into the prepared cake pan. Bake for 30 minutes, until risen. Leave to cool completely while you make the strawberry orange syrup.

Heat the remaining sugar with 100 ml water in a small pan over low medium heat, swirling until the sugar has dissolved and thickened. Remove from heat. Pour in the orange juice then add the zest, stirring well to combine. Add the remaining strawberries. Increase the heat and boil for a couple of minutes, until the liquid has reduced. Leave to cool for 5 minutes.

When cool enough to handle, turn the cake out of the pan, and peel away the baking paper. Arrange the strawberries on top (middle) of the cake, pouring all over the cake the prepared syrup. Serve immediately.