3 Unwaxed lemons, roughly chopped
140g Zusto
1L Cold water


1. Tip the lemons, Zusto and half the water into a food processor and blend until the lemon is finely chopped.
2. 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.