For the meringue, place egg whites and cream of tartar in the mixer and whisk on high until soft peaks form. Gradually add caster sugar and whisk until mixture is glossy. Fold in vinegar, cornflour and vanilla essence and beat to combine.
Pile meringue mix in a circle shape and make a small indent in middle.
Reduce heat to 100°C and place in oven. Bake for 1 1/2 hours.
Take out of oven to cool.
Using a clean mixing bowl, whip the Bulla Thickened Cream until soft peaks form.
To serve, spread cream over the meringue and scatter berries to finish.