Method

• 1.
  Combine the sugar, 150ml water and the grated zest of 1 lemon in a small saucepan over medium heat. Stir until the sugar dissolves.
• 2.
  Squeeze the lemons until you have 100ml juice. Add to the pan and leave to cool, then taste (you may want to add more sugar). Strain lemon cordial through a coarse strainer into a jug. Pour into a screw-cap or corkable bottle and store in the fridge until required.
• 3.
  To serve, pour lemon cordial into glasses and top up with soda water or sparkling mineral water to taste.