Prepare garnish: cut an orange zest twist and skewer a green olive on a cocktail pick.
Fill an old-fashioned glass to the brim with ice cubes.
Pour 60ml Prosecco into the glass.
Add 40ml red bitter liqueur.
Top with 20ml soda water.
Give a single brief stir with a bar spoon to integrate without losing carbonation.
Express the orange zest twist over the surface of the drink to release its oils, then discard the twist.
Lay the skewered olive across the rim of the glass and serve immediately.
The traditional Venetian ratio is 3-2-1: three parts Prosecco, two parts bitter liqueur, one part soda - a formula codified by Campari and widely adopted across the Veneto. Using a local Select Aperitivo instead of Campari stays truest to the drink's Venetian roots.
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