French 75

1½ oz Dry Gin
1 teaspoon simple syrup
Chilled Champagne, Prosecco or Cava
Lemon

Half fill a cocktail shaker with cracked ice and add gin, simple syrup and the juice of 1/2 lemon. Shake the mixture vigorously and strain it into a highball glass packed with cracked ice. Fill the glass with chilled Champagne.