I was hoping to use my steam juicer for "canning" in jars, US-style, but then read about botulism. Chutneys and jams are too sweet, acidic or salty to allow spoilage when correctly stored but canned ingredients would form a major part of a meal, so cannot be so strongly flavoured. You need to invest in the correct jars and replacement lids and a deep stockpot and rack if not using a proper canning pot or pressure-cooker. You need the higher temperature from a pressure-cooker if you're going to process animal protein. It's less risky, and with nutritional benefits, to use a freezer. A lactic acid fermentation (e.g. sauerkraut) has nutritional benefits and a low energy requirement for both processing and storage.