In a mixing glass, combine the cranberry juice, chopped rosemary, honey (or agave syrup), and lime juice. Stir well to mix the honey thoroughly into the liquids.
Allow the mixture to sit for about 5 minutes, letting the rosemary infuse its flavor.
Fill a serving glass with ice cubes.
Strain the cranberry-rosemary mixture over the ice, filling the glass about two-thirds full.
Top off the drink with sparkling water, giving it a gentle stir to mix.
Garnish with a sprig of fresh rosemary and a slice of lime on the rim of the glass.
Serve immediately and enjoy your refreshing mocktail!
Notes
Adjust sweetness to taste with honey or agave syrup.