Instructions

1. Combine sugar, water, and thyme in a small saucepan over medium heat, stirring until sugar dissolves. Bring to a boil, reduce heat, and simmer 5 minutes. Remove from heat; cool to room temperature, about 30 minutes. Strain.
2. Combine ½ cup passion fruit juice, ¼ cup pineapple juice, and ¼ cup prepared simple syrup in a large cocktail shaker filled with ice. Cover and shake until chilled, about 30 seconds.
3. Strain mixture into 2 glasses filled half full with ice; top with sparkling water. Repeat process with remaining juice and simple syrup. Garnish, if desired. Makes 4 servings.