1 egg white
70 g powdered sugar
15 ml water
250 g berries
Mix the berries, 20 g of powdered sugar and water and finely puree in a blender. Beat an egg white until stiff and mix with the berry mixture.
Pour through the iSi Funnel & Sieve into a 0.5 l whipper, screw on 1 cream charger and shake vigorously. Leave to cool in the refrigerator for 3 hours.