3 egg whites
3oz caster sugar
beat egg whites with electric mixer (until you can turn the bowl upside down without it falling out!)
then add the sugar small amounts at a time but quickly so as to not over-beat
then spoon (or piping bag) mixture onto a tray lined with baking paper and put in oven at 150C for 1 hour and allow to cool down in the oven, preferably overnight
I've never had any problems with this recipe, good luck!