Combine cream, sugar, and zest in medium sized heavy saucepan and bring to a boil. Continue to boil for 10-12 minutes, stirring frequently making sure a sugar has dissolved. If mixture begins to boil over, remove momentarily from heat.
Remove from heat, add lemon juice and allow to cool, a skin will form on top. Strain mixture through a fine mesh sieve, discarding zest. Carefully pour evenly into 8 small espresso sized cups.
Place cups on a small baking sheet and refrigerate uncovered for 2-3 hours. Plastic wrap may be used to cover after 3 hours. Garnish with berries before serving.