Heat water in pan and add sugar. Simmer and stir until sugar dissolves, add lemon juice and grated lemon rind and continue to simmer and stir for a few minutes. Take off the heat and allow to cool. Fine strain into a shallow container and stir in liqueur and orange bitters. Beat egg whites and fold into mix. Place in freezer and store for up to 3-4 days before use.
Grated lemon zest
Our favourite recipe for this dessert and occasional cocktail ingredient.
To make any other citrus flavour sorbet, simply substitute the juice and peel of another fruit such as grapefruit lime or orange.