In saucepan, combine 2 cups (500 mL) cream, honey, sugar, lemon zest and vanilla; cook over medium heat for 3 to 5 minutes or until mixture starts to simmer around edge of pan.
Remove from heat.
Meanwhile, sprinkle gelatin over remaining cream; let stand for about 5 minutes or until gelatin has softened.
Stir gelatin mixture into cream and honey mixture; whisk until gelatin is dissolved.
Strain through fine-meshed strainer.
Divide mixture among four (6 oz/175 mL) ramekins, bowls or cups.
Cover with plastic wrap and refrigerate for about 6 hours or until set.
Serve panna cotta in ramekins or turn out onto serving dishes.