Sparkling Rhubarb Raspberry Lemonade

Name: Sparkling Rhubarb Raspberry Lemonade
Prep time: 1 h
Cook time: 15 min
Total time: 1 h 15 min
Cuisine: American
Ingredients: 4 cups chopped rhubarb stalks; 1 cup raspberries; 1 1/2 cups cane sugar; 1 Tablespoon finely grated lemon zest; 3/4 cup fresh squeeze lemon juice; 1 Tablespoon pure vanilla extract; Prepared Raspberry Rhubarb Syrup; 2 liters sparkling water; Ice, for serving