You can adjust the sweetness level by adding some icing sugar.
You will need a cocktail shaker for this one!
To make sugar syrup simply combine equal parts of sugar and water (1:1) in a bottle and shake it until the sugar is completely dissolved.
Place the Jameson, freshly squeezed lemon juice, sugar syrup, egg white and lime juice into a cocktail shaker. Shake until well blended.
Place ice cubes into a glass, pour the cocktail over and garnish with an orange twist.