Peel the kiwi and mash it in a strainer over a glass or small bowl. You should get about 2 tablespoons of tart juice. Wash and stem the strawberries and mash the juice through the strainer. Pour juice mixture over ice in a fancy glass. Top with seltzer and enjoy.
The serving contains about 30 calories, 1 g protein, 0 g fat, 10 g carbohydrates, 2 g fiber, and 1 mg sodium.