Step 1.
- Fill a highball glass with ice cubes.
Step 2.
- Pour in the gin over the ice.
Step 3.
- Add tonic water to fill the glass.
Step 4.
- Squeeze a wedge of fresh lemon juice into the drink.
Step 5.
- Stir gently to mix the ingredients.
Step 6.
- Garnish with a lemon wheel on the rim.