Blend the rough bindweed fruit with water. Strain and mix with sugar in a small pot. Bring to a boil over medium heat and allow to thicken for 15 minutes. Allow to cool.
In 10 fl oz glasses, put the ice and fill with orange juice up to half. Add ginger ale and a shot of gin to taste.
Finish with 4 tablespoons of the rough bindweed fruit reduction and serve.