- In a shaker, add Ketel One Citroen, St-Germain, lemongrass syrup, lemon juice, and ice. Shake vigorously.
- Strain into Champagne flute. Top off with sparkling wine.
- In stockpot, add all ingredients and bring to a boil. Once sugar has dissolved completely, remove from heat and allow to cool.
- Strain to remove lemongrass chunks.