• 1 tablespoon sweet basil seeds
• 80 ml (2½ fl oz/⅓ cup) lukewarm water
• juice of 1 large lemon
• 2 tablespoons sugar or honey, dissolved in 60 ml (2 fl oz/¼ cup) warm water
• pinch of salt
• ½ teaspoon black salt
• ice cubes, to serve
• mint sprigs, to garnish

Clean the basil seeds of any grit or small stones. Wash the seeds and place in a bowl. Add the lukewarm water and leave for 15–30 minutes, or until the seeds begin to swell. When you observe a transparent jelly-like coating over the seeds, they are ready to use.

In a bowl, combine the lemon juice, sugar or honey syrup, salt and black salt, mixing well. Add 600 ml (21 fl oz) water and the basil seeds, along with any leftover water from soaking the seeds. Mix well.

Pour into two glasses and serve with ice cubes and mint.