Though many of us live in cities, we can still garden and grow our own food. But we associate this with summer, with ripening strawberries in the early season, perhaps red tomatoes later on. And when they are gone, they are gone until next year. What most people don’t realize is that canning their own food is still possible in their own kitchens. Indeed, many supermarkets stock not only flats of glass jars, as well as lids, but also the hot-water baths needed to process the jarred goods, and those crucial tools like tongs to fish hot jars out with.