Pour sparkling wine into a chilled coupe glass. Double strain (to remove those bits of fruit and herbcontents of shaker into a coupe glass overtop the sparkling wine. Garnish with a single sage leaf.
Combine boiling water and honey in a heatproof jar. Stir or put the lid on and shake vigorously until honey is dissolved in water. Honey syrup will keep for up to 2 weeks in an airtight container in the fridge.
Recipe adapted from: Todd. "Golden Plum & Sage Cocktail." Honestly Yum. July 17, 2013.