4 large grapefruits, juiced and seeds removed
4 tablespoons of ginger, skin removed and roughly chopped
1 ½ cups sugar (will vary depending on grapefruit juice yield)
1 liter soda water
Handful of red basil leaves, for garnish
In a small saucepan over medium-low heat combine grapefruit juice, ginger and sugar and warm through till sugar is dissolved and let cool. In a large pitcher, add ice and combine grapefruit ginger syrup with soda water, stir and serve.