Cut the sausage in about 1/4" slices and fry it on medium/high heat in a pan with a bit of olive oil until the fat starts seeping out. Transfer to slow cooker.

Fry the steaks or chops in the sausage/olive oil. Add more oil if needed. High heat for 20-30sec on each side. No need to cut the meat up. The Slowcooker process will tenderize it to strings. Bones can remain for now and can extracted after the stew is finished) Transfer to slow cooker

Reduce heat and add some butter.

Once the butter is at temperature add onions and garlic and caramelize them until they glaze over. Transfer to slow cooker

Add the mushrooms to the pan and let them absorb the resulting broth. Add a bit of water and the beef broth to the pan. Then after stirring for a few seconds add the tomatoes and paprika (and Pimenton, Cheyenne if you like it a bit spicey) to the mix and transfer everything to the slow cooker. Salt and pepper to taste. Maybe add a bit of Beefbroth instead of salt. Less is more. The Slowcooker will unchain a lot.of taste from the meat.

You can add all kinds of leftovers at this point. Like vegetables that go in soup (kohlrabi, turnip, carrot, celery, leek, endive)... Processing leftovers is what stew is for. I would avoid sweet stuff like corn but tomatoes are also fine and go in roughly chopped or even quartered...

Drain the Sauerkraut from excess fluid (not a problem if there is some left) and add it to the slow cooker. If it's too sour for you, you can reduce the acid by quickly blanching it in water and draining it before transferring it to the mix. I like the acidic taste. It's how it's supposed to be and it helps tenderize the meat.

Slice or dice the pickles and add them together with the rest of the ingredients. Mix everything thoroughly and make sure the meat is covered.

A side of sourdough bread or simple mashed potatoes are ideal. Some sourcreme or creme fraiche to reduce acidity maybe? Certainly...