1. Preheat oven to 275 degrees, place egg whites in a bowl and mix 1/3 of sugar, whisk until frothy.
2. Add 1/3 sugar and cream of tartar, whisk until you see a soft peak. Add remaining sugar and vinegar, whisk until you have a hard peak.
3.  Gently spoon about 1 cup of the egg whites onto a non stick baking sheet and spread out to a 8 inch disk about 1/2 thick. Repeat until mixture is finished. 
4. Bake at 275 for 30 min then turn oven off and leave meringue to finish for another 2 hours. 
5. Remove ‎stack meringues with a layer of crème fraiche then berries, repeat and garnish with mint and icing sugar.