3 limes - crushed, juice reserved
1 cup white sugar
3 sprigs fresh lemon zest
1 pint heavy whipping cream
1 (12 fluid ounce) can or bottle lemon-lime flavored carbonated beverage
In a large pitcher or punch bowl, combine limes, sugar and lemon zest. Shake vigorously until sugar is dissolved and lemon zest is completely dissolved. Slowly pour in the whipping cream. Stir in lemon-lime soda.