Line a flat baking tray with paper. Preheat oven to 150°C.
Before beginning, make sure your bowl and beaters are scrupulously clean and dry. It is best not to use a plastic bowl for whipping egg whites.
Place egg whites, cream of tartar and salt into the bowl and whisk until foamy.
Gradually add the brown sugar, ¼ cup at a time, whisking between additions until well incorporated.This may take up to a few minutes.
Add vinegar and vanilla and whisk through.
Spread the mixture in a large circle on the prepared tray.
Bake pavlova for 45 minutes. Turn oven off and leave in oven for 10 minutes. Remove from oven and allow to cool completely without moving it.
Serves 8 - 10
To serve, whip cream and fill hollow. Top with ample amounts of berries of choice. Warm a little jam in a small saucepan or microwave and drizzle over the top of the berries.