Sauerkraut is extremely easy to make at home, in amounts as large or small as desired. Shred cabbage and mix it with salt (a half tablespoon of salt per pound of shredded cabbage). Pack the cabbage into mason jars to one inch below the top, and tighten the lids. After the salt has had a chance to draw out water for a few hours, open the jars and pack the cabbage down to cover with liquid (if there's not enough liquid, add a little filtered water), and put the lids back on tightly. Keep the jars at room temperature, preferably on the cool end of room temperature. Once a day, loosen the lids just enough to vent off any gas pressure and retighten the lids. Do not open the jar all the way, as that lets oxygen back in to the jar. The gas that vents off is CO2, and it purges the jar of oxygen, making it impossible for yeasts and other nasties to grow. After five days or so, the jars stop venting, and at that point, they should be put in the fridge to age for at least two more weeks.