Fragrant osmanthus sour plum soup combines floral and tangy flavors in a refreshing drink. A family recipe with fresh, traditional appeal.
Rinse dried sour plums, hawthorn berries, and osmanthus flowers briefly under cold water to remove dust.
Combine sour plums, hawthorn berries, osmanthus flowers, and water in a medium pot over medium-high heat until boiling.
Reduce heat to low and simmer uncovered for 25 minutes, allowing flavors to infuse fully. Skim any foam from the surface as needed.
Add rock sugar and stir until dissolved, simmering for another 10 minutes on low to integrate sweetness.
Remove from heat, strain the mixture through a fine mesh to eliminate solids, then add lemon juice and salt while the soup is still warm. Chill for at least 1 hour before serving.