Step 1In a shaker, add 3 watermelon triangles, 6 slices of cucumber, 2 sprigs of mint, the lime juice and the syrup. Hand press with a muddler.
Step 2Add the soju and fill the shaker with ice. Shake vigorously for 6 seconds.
Step 3Strain over fresh ice into a tall glass and top with the ginger ale.
Step 4Place a watermelon triangle and a cucumber slice on a toothpick and place in glass for garnish along with a sprig of mint.