Add all the ingredients except the cream and soda water to your tin. Whip shake with 2 cubes until nearly dissolved (around a minute). Pop the tin, add the cream and some cracked ice, and vigorously shake for 15 seconds. Pop the tin, add 2 oz club soda, and strain into a Collins glass (no ice).
If you don't have green apple liqueur, you can either muddle some chopped green apple with .5 oz simple syrup, or use fresh green apple juice mixed with simple syrup (.5 oz each would probably work fine)