In a saucepan, combine the heavy cream and sugar.
Heat the mixture over medium heat, stirring until the sugar dissolves.
Bring the cream to a gentle simmer, then remove from heat.
Stir in the fresh lemon juice and lemon zest.
Let the mixture cool for about 10 minutes.
Pour the mixture into individual serving dishes or glasses.
Cover with plastic wrap and refrigerate for at least 4 hours, or until set.
Once set, remove from the fridge and garnish with mint leaves.
Serve chilled and enjoy the refreshing taste.