2 egg whites
75mg caster sugar
1/2 tsp cream of tartar
Bake in the oven at 110c / 90c fan for 1 1/2 hour. Without opening the door, leave in the oven for another 2 or more hours. For a nicer presentation, you can pipe the meringue; but I don't usually bother, instead I form shapes using two spoons.
