Combine water and sugar in a saucepan over medium heat
Stir until the sugar dissolves completely
Add dried lavender and simmer for 5 minutes
Remove from heat and let steep for 30 minutes
Strain into a clean container and chill
Mix the Cocktail:
Fill a cocktail shaker with ice
Add lavender syrup and lemon juice
Shake for 15 seconds until well chilled
Strain into a champagne flute
Top with prosecco
Garnish with a fresh lavender sprig
Notes
The lavender syrup keeps in the refrigerator for up to 2 weeks.Make sure to use culinary lavender, as ornamental varieties can taste bitter.For a mocktail version, replace prosecco with sparkling water or lemon-lime soda.Adjust the amount of lavender syrup based on preferred sweetness level.