Honey and rhubarb are a perfect match; the tartness of rhubarb is a lovely foil for the sweetness of honey. This Homemade Honey Rhubarb Soda is quick and easy. Gin or even vodka can be added to the recipe below for a refreshing early-summer cocktail. I garnish it with peony petals, but any edible flower will do. This drink is also pretty enough to stand on its own.