01 - In a medium saucepan, combine the heavy cream and granulated sugar.
02 - Place over medium heat, stirring gently, until the sugar dissolves and the cream just begins to simmer (do not boil).
03 - Remove from heat. Stir in the lemon juice and zest. The mixture will thicken slightly as the acid reacts with the cream.
04 - Allow the mixture to cool for 10 minutes, then pour into 4 individual serving glasses or ramekins.
05 - Refrigerate for at least 3 hours, or until set with a silky, pudding-like texture.
06 - Serve chilled, optionally garnished with fresh berries, extra lemon zest, or a shortbread cookie.