This drink has been a favorite for quite some time but has disappeared recently mainly due to a lack of true sloe gin. Perhaps the most classic use of sloe gin, the fizz brings vibrancy and life to the tart liqueur.
If using egg white, add Sloe Gin, lemon juice, sugar, and egg white to shaker. Dry shake vigorously. Add ice to shaker and shake well, then strain into a small, chilled Collins glass, and fizz to an inch or so from the top — splash in club soda or seltzer, so that it foams to the top.