Cordials

• 3/4 cup caster sugar
• 1/3 cup lime juice
• 1/2 cup water
• 1 cup grapefruit juice
• 300g fresh or frozen raspberries

Put caster sugar, lime juice, water and grapefruit juice in a saucepan. Stir over a low heat until the sugar dissolves. Add raspberries and cook for 2 minutes or until the raspberries break up slightly. Remove from the heat and cool slightly. Strain the cordial into a jug and discard raspberry pulp. Pour the cordial into clean bottles and keep in the refrigerator for up to 3 weeks.
To serve, add a couple of tablespoons of cordial to chilled soda water or lemonade.