Limoncello and Basil Posset

In a medium saucepan combine the cream, sugar, salt and basil. Bring to a gentle simmer over medium heat, stirring occasionally to dissolve the sugar. Simmer for 1 minute. Remove from the heat and whisk in the lemon zest, lemon juice and limoncello. The mixture will thicken so keep whisking to thicken evenly. Remove and discard the basil sprigs. Allow the mixture to cool for 15 minutes, stirring occasionally. Divide the mixture into 6 to 8 small glasses or hollowed out lemon “cups”. Refrigerate until completely chilled, at least 4 hours or overnight. Serve chilled garnished with a basil sprig if desired.