Before there was "frosé", there was this cool, sweet treat that doesn’t require a blender. You can vary the fruit depending on what you have on hand; strawberries or raspberries would be delicious. You'll need to make a simple syrup, and to do this, simmer equal parts water and sugar in a saucepan over medium heat for 10-15 minutes; turn it off when the mixture reduces and looks syrupy. Take it off the heat and add a handful of washed basil or mint (if using) and let sit until cool. Strain into a jar or bottle and keep in the fridge for 3-4 weeks.