Step 1

Add blueberries, lime juice and water to a small cooking pan.

Step 2

Bring to a boil and simmer for 10 minutes until much of the water has evaporated. This will create a blueberry syrup.

Step 3

Press the blueberry syrup through a sieve into a large glass. Set aside.

Step 4

Add ice cubes to your cocktail glasses.

Step 5

Then add tonic water and gin.

Step 6

Finish by pouring in your blueberry syrup.

Step 7

Top off with lime slices and lime zest if desired.