Preheat your oven to 120°C and line two baking trays with non-stick baking paper.
Using an electric mixer, whisk the egg whites and salt until soft peaks form. Gradually add the sugar, a tablespoon at a time, whisking well between each tablespoon, until the sugar dissolves.
When all the sugar has been added, continue to whisk on high for 3 mins and add in the vanilla essence. Spoon the mixture onto your baking trays.
Reduce the oven temperature to 90°C. Bake your meringues for 1 hour and 30 mins. Turn oven off and leave meringues in the oven to cool completely.
Preheat oven to 120°C. Line two baking trays with non-stick baking paper.