Strawberry-Rhubarb Sangria

In a small saucepan, combine sugar and water. Bring to a boil, add rhubarb. Transfer mixture to a medium heatproof bowl and let cool to room temperature, about 30 minutes.

Meanwhile, in a pitcher or large bowl, combine orange juice, orange, and strawberries. To serve, add cooled rhubarb mixture, seltzer, sparkling wine, and ice.