Potato Salad with Ginger and Horseradish

Growing horseradish is no trouble – rather, the difficulty comes in eradicating it from the garden. I dig it up in the late summer, don goggles and grate it into a glass jar. Cover it with good quality vinegar and keep all year until you need it, when you just have to add fresh cream to make horseradish sauce of very high quality. (The goggles are needed in the grating because the root can have a shocking effect on the eyes.)