Preheat your oven to 150°C (300°F) and line a baking tray with parchment paper.
Using an electric mixer, beat the egg whites until soft peaks form.
Gradually add the caster sugar, a spoonful at a time, while continuing to beat, until the mixture is thick and glossy.
Add the cornflour, white vinegar, and vanilla extract, and gently fold them into the meringue mixture.
Spoon the mixture onto the prepared baking tray, shaping it into a circle or oval, and create a slight indentation in the center to hold the toppings.
Place the pavlova in the oven and immediately reduce the temperature to 120°C (250°F).Bake for about 1 hour and 15 minutes, or until the pavlova is crisp on the outside and dry to the touch.
Turn off the oven and let the pavlova cool completely inside the oven with the door slightly ajar.
Once cooled, carefully transfer the pavlova to a serving plate and top with whipped cream and fresh fruits.