01 - Combine heavy cream and granulated sugar in a medium saucepan over medium heat. Stir gently until sugar dissolves and cream just begins to simmer, avoiding a boil.
02 - Remove from heat and stir in lemon juice and zest. The mixture will thicken slightly as acid reacts with cream proteins.
03 - Cool mixture for 10 minutes, then pour into 4 individual serving glasses or ramekins. Refrigerate for at least 3 hours until set with silky, pudding-like texture.
04 - Serve chilled, optionally garnished with fresh berries, additional lemon zest, or shortbread cookie.