3 unwaxed lemons, roughly chopped
140g caster sugar
1l cold water
Tip the lemons, sugar and half the water into a food processor and blend until the lemon is finely chopped.
Pour the mixture into a sieve over a bowl, then press through as much juice as you can.
Top up with the remaining water and serve with plain ice or frozen with slices of lemon and lime.
Recipe adapted from: Good Food