In the same saute pan with leftover bacon fat, add chopped sauerkraut (or shredded store bought.
Stir fry for 3-4 minutes then adds water or stock/broth. Cover with lid and let it cook under the lid for the next 5 minutes on medium-high heat.
Sauerkraut: I find store bought extremely salty, so I always wash under cold water, however, you can add it without washing, just make sure to squeeze cabbage juice out. My sauerkraut is very mild in flavor. It is perfectly seasoned and not as sour as the store bought. Either way, the addition of extra Salt is not necessary! It's not a "huge" difference per se in taste between homemade and stores bought sauerkraut when it's cooked, however, homemade give you a far better flavor.