0 Combine gin, lemon juice, and St Germain in a cocktail shaker.
1 Add a handful of ice to the shaker. Firmly place the lid on the cocktail shaker. Shake for 30 seconds to combine the cocktail ingredients and chill them.
2 Strain the cocktail into a champagne flute or coupe glass.
3 Fill the remainder of the glass, almost to the top, with chilled champagne or sparkling wine.
4 Garnish with a lemon peel twist.
