Zest from 2 lemons (1 grated finely, 1 peeled in chunks)
20Mint leaves
3tablespoonLimoncello Liqueur
1Egg white (see notes)
Instructions
Put the water and sugar into a medium-sized heavy-based pan and heat moderately to dissolve the sugar
Turn up the heat, bring to the boil and drop in the lemon zest. Boil for 2 minutes
Allow to cool then remove the chunks of lemon zest (you can pass the syrup through a sieve to remove the finely grated zest too if desired), cover and chill the liquid for several hours
Meanwhile, blitz the lemon juice and mint leaves in a blender (optional: strain through a sieve to remove the mint pulp). Chill
Stir the juice and the Limoncello into the syrup and churn in an ice cream maker. When the sorbet is beginning to hold it's shape whisk the egg white until just beginning to firm up and pour into the mix. Continue to churn until firm
Decant into a freezer-proof container, cover with parchment and freeze for several hours
Use within 2 weeks
Notes
The British Lion is the UK's most successful food safety scheme, responsible for a drastic reduction in the presence of salmonella in UK eggs. I recommend always buying eggs that have the lion stamp. If you have concerns about using raw egg whites, consider purchasing a tub of pasteurised egg whites from the supermarket. You will need 40g.