In a cocktail shaker, gently muddle the sage leaf with the ginger syrup to release its flavor.
Add the pear nectar, lemon juice, and a handful of ice. Shake well until chilled.
Strain into a serving glass filled with ice, then top with the sparkling water. Stir gently to combine.
Garnish with a fresh sage leaf and a slice of pear. Serve immediately and enjoy!