This never fail pav is very easy. Just beat together egg whites, cornflour, caster sugar, vanilla and vinegar, spoon onto a baking tray then bake. Will not fail.
Preheat oven to 150 degrees C. Grease a baking tray.
Put all ingredients in a bowl and beat until very thick.
Spoon onto prepared tray in a circle.
Bake 1 to 1 1/2 hours. Turn oven off then leave in oven until cool.