Steps
- Chop ½ grapefruit with its peel. Put in a saucepan with 1 slice of orange, 125g of superfine sugar, and 125ml of water.
- Add 3 lightly crushed cardamom pods and 1 pinch of coriander seeds. Simmer over medium-low heat for 5 minutes, crushing the fruit as it softens. Cool and strain, discarding the solids.
- Fill a rocks glass with ice. Add 25ml of the citrus syrup, 25ml of white grape juice, and 25ml of cold water. Stir until cold.