Special thanks go to my Mum, Lin Callanan, who read told me this recipe over the phone. The egg yolks can be used for ice cream.
4 egg whites
115g / 4 oz sugar
Preheat the oven to Gas Mark 2 / 140 degrees C / 300 degrees F. Whisk the egg whites with an electric whisk or food processor whisk attachment until it forms soft peaks. Gradually add the sugar (while still whisking) and continue whisking until reasonably stiff peaks form. Scoop 12 blobs of the mixture onto greaseproof paper on a baking sheet, and bake for about an hour.