We usually wedge up lemons and limes and freeze them, they are better than ice cubes in a gin and tonic. But we somehow ended up with half a dozen of each so marmalade was made instead. Now instead of using water I used up some out of date tonic water, then after all the usual preparations with the fruit and boiling the @rse out of it, I added some gin. Gin and Tonic marmalade. Really delicious, it coud even be habit forming.