Not quite a traditional recipe, but with very traditional flavors, Ryan Gannon's version is "firmed up" with Cointreau.
- 2 large mint leaves
- 2 slices cucumber
- 3/4 ounce freshly squeezed lime juice
- 3/4 ounce Cointreau
- 2 ounces Pimm's No. 1
- Ginger ale
Put mint leaves, cucumber, and ice in a highball glass. Fill a cocktail shaker with ice. Add lime juice, Cointreau, and Pimm's. Shake and strain into glass. Top with ginger ale.