Step 1.
- Fill a highball glass with ice.
Step 2.
- Pour in 1.5 oz of gin.
Step 3.
- Add 1 oz of elderflower liqueur.
Step 4.
- Squeeze in the juice of half a lemon (about 0.5 oz).
Step 5.
- Top with 3 oz of tonic water.
Step 6.
- Stir gently to mix the ingredients.
Step 7.
- Garnish with a lemon twist and an elderflower sprig.