Easy, Delicious Lemon Posset

I got this recipe on allrecipes.com and it's another 5 star winner. It is SOOOOOOO EAAASSSY and delicious. Nice and smooth and creamy and flavorful. I put some candied peel on top for decoration.

3 cups heavy cream
1 cup white sugar
3 lemons, juiced
1 T lemon zest
3 T additional heavy cream for topping (optional)

In a saucepan, stir together 3 cups of cream and sugar. Bring to a boil, and cook for 2 to 3 minutes. Stir in the lemon juice. Pour into serving glasses, and refrigerate until set, about 5 hours. Pour a little more cream over the tops just before serving.