Add lemon juice and ginger syrup to a cocktail shaker with ice.
Shake for 10-15 seconds until well chilled.
Strain the mixture into the prepared highball glass.
Pour in the prosecco slowly.
Top with a splash of club soda.
Stir gently with a bar spoon to combine.
Garnish with a lemon wheel and piece of candied ginger.
Notes
The ginger syrup can be made ahead and stored in the fridge for up to 2 weeks.To make ginger syrup, combine water, sugar, and sliced ginger in a pot. Bring to a boil, then reduce heat and simmer for 15 minutes. Strain and let cool.For a non-alcoholic version, replace prosecco with additional club soda.Adjust the amount of ginger syrup to taste - some prefer it spicier, others milder.