Add all ingredients, besides the La Croix soda and the Fuyu persimmon, in a cocktail shaker
Dry shake without ice for 10 seconds. Then add ice and shake again for 15 to seconds
Strain into a tall glass and add a splash of soda to create a thick foam
Cut a Fuyu persimmon into wheels and use them for garnish. You can sprinkle them with sugar and caramelize them using a blowtorch prior to garnishing the cocktail. The caramelized persimmon wheel would be a great snack to go along with the cocktail :)
Use Hachiya persimmons for the jam. Before you make the jam, make sure the fruit is soft and squishy as this is an indicator that the fruit is ripe. The mature fruit has a jellylike texture, and it almost looks like it's gone bad. It might not be very appealing to eat the fruit itself, but that shouldn’t stop you from making a delicious jas with the ripe persimmons pulp that is hiding under the bruised skin. If you buy persimmons that are not ready, the fastest way to ripen the would be to freeze them overnight and then defrost them.