1.Preheat the oven to 120°C (100°C fan-forced). Grease an ovenproof serving platter with a little softened butter; dust with a little cornflour, shake away excess. (Or, draw a 22cm round on baking paper; invert paper onto a lightly greased large oven tray.)
2.Beat egg whites and cream of tartar in a medium bowl with an electric mixer on high speed until soft peaks form. Gradually add caster sugar, beating until sugar dissolves between additions. Continue beating until the sugar is completely dissolved at this stage.
3.Reduce speed to low; beat in cornflour and vinegar until just combined.
4.Spoon meringue on prepared platter to about 22cm round; mixture will spread slightly. Use the back of a spoon to shape the side of the pavlova. Make a slight indent in the top.
5.Bake, uncovered, for about 1½ hours or until dry to touch. Turn the oven off; cool pavlova in the oven with the door slightly ajar.
6.Just before serving, beat cream, vanilla and icing sugar in a small bowl with an electric mixer until soft peaks form. Spoon cream over the pavlova, top with mango, passionfruit pulp and leaves.
Not suitable to freeze or microwave. If you are cooking the pavlova on the serving platter, make sure it will fit into your oven before you start. There are many sturdy porcelain inexpensive serving platters available. Don’t use delicate bone china or highly decorated platters.