4 medium oranges
2 tbsp sugar syrup
a few ice cubes
soda water, chilled
1 Cut off the peel from the oranges and lemon, removing as much white pith as possible. Chop the flesh roughly, discarding any pips, and put in a blender and blitz until smooth. Sweeten with sugar syrup to taste.
2 Divide between two glasses and add a few cubes of ice. Top up with soda water and serve immediately.