There is nothing better than a sweet, frosty beverage on a hot summers day and this one really just screams summer to me. I love nothing more than to use ingredients that are in season and why not carry that over to your beverages as well? Taking a sip of this, you can smell the lushness of the strawberries. You can taste that slight tartness of the rhubarb and the sparkling water awakens your taste buds and brings a freshness to your mouth.
Combine the first four ingredients in a large pot and bring to a boil. Reduce the heat and allow to simmer for 40 minutes. This may vary, but you want the fruit to be really soft. You want as much goodness to come out as possible!
Strain the fruit through a colander and then through a sieve. Keep the large chunks of fruit for topping waffles, pancakes, crepes, or ice cream!
Place the simple syrup in a container and allow to cool fully in the refrigerator.
Once the simple syrup has cooled, add about 1/3 cup of simple syrup to a large glass filled with sparkling water and ice.