Makes enough to cover one 15 cm / 6 in cake
50g/2 oz fructose
A pinch of salt
1 egg white
2.5 ml lemon juice
Process the fructose powder in a food
processor until it is as fine as icing sugar. Blend in the salt.
Transfer to a heatproof bowl and whisk in the egg white and lemon
juice. Place the bowl over a pan of gently simmering water and
continue to whisk until stiff peaks form. Remove from the heat and
whisk until cool.