Place mint leaves and elderflower syrup into a muddler and gently crush until the mint releases aromatic oils, about 10 seconds. Visual cue: fresh, vibrant mint leaves and a fragrant mixture.
8 fresh mint leaves, 1 oz elderflower syrup
Fill the glass with ice to about three-quarters full. Visual cue: glass appears chilled and filled with clear ice cubes.
Ice ice
Pour the chilled prosecco over the muddled mint and syrup mixture, filling the glass halfway. Visual cue: bubbles beginning to rise and the liquid merging seamlessly.
2 oz prosecco
Add the soda water slowly, pouring gently to preserve the bubbles, until the glass is nearly full. Visual cue: a light, fizzy mixture with visible bubbles rising to the surface.
2 oz soda water
Garnish with a lime slice and a sprig of fresh mint. Visual cue: lime wedge perched on the rim and mint leaves resting on the drink surface, with a sparkling, aromatic appearance.
1 slice lime, 8 fresh mint leaves
Serve immediately with a straw or stir gently before sipping. Visual cue: well-mixed, bubbly, herbal-colored drink at the perfect temperature for drinking.