6 egg whites
2 cups sugar
4 tbsp cornflour (cornstarch in the US)
6 tbsp boiling water
2 tsp vanilla essence
2 tbsp vinegar (white)

Put all ingredients in the bowl of an electric mixer and beat for 15 - 20 minutes or until very stiff. When you pull the beaters out, the mixture should stand up in stiff peaks. (I find at altitude, I usually have to beat the mixture for 30 minutes or more.)

Pile on to baking paper on an oven tray. You can also use aluminium foil on the baking tray. Lightly dust with cornflour so the pav won't stick. Pile it up high and do not spread out, as the pav will spread while cooking. Use a fork to mark ridges up the side.

Put in the middle of a cold oven. Turn the oven on to 250 deg F. Cook for 2 hours. Turn oven off and leave the pav in the oven, with door closed, overnight or until the oven is cold. This takes at least 6 - 8 hours. (Do not open the oven at any point during the cooking or cooling. Not even a quick peak!! This may cause the pav to fall.)