Mary has a suggestion for mixing pavlova ingredients, which are 4 egg whites, 1 cup castor (fine) sugar, 1 teaspoon vinegar, 1 teaspoon vanilla essence, and 1 tablespoon cornflour.  Mary says, “an easy way to mix the pav is put the egg whites and caster sugar in the mixer and beat continuously for ten minutes on high. Mix  the vinegar, vanilla and cornflour together. Add to the mix and beat continuously for a further four minutes. Never fails.” Place the mixture onto a baking paper covered tray and shape into a circle about 200mm in diameter. Preheat the oven to 150C. Put the pav into the oven and turn down to 125C. Wait an hour then turn the oven off. Leave it in the oven until cold or overnight.