Hungarian Goulash a.k.a. Segedinsky Goulaj

Ingredients -- Ovo-Lacto Vegetarian with optional meat

If meat is desired, 2 lbs. of Pork or Veal, cubed
1 lb. Mushrooms, diced
1 large Onion, finely chopped
1 jar rinsed Sauerkraut
1 to 1+1/2 cup sour cream
1/4 cup Wondra flour
Water or Soup Stock to cover the other ingredients; butter or oil for frying
Generous dash of Paprika
salt & pepper to taste
Often served over noodles -- see my notes elsewhere about keto substitutes for noodles. Shiritaki noodles, low-carb Asian noodles such as mung bean, "Ancient Grains" or other low-carb noodles from chickpeas and other alternatives; spiral-cut squash, or thinly sliced green beans are possibilities.

Sautẻe the meat, if desired, with the onion, in the butter until the onion becomes translucent. Add the mushrooms at the last few minutes, frying until they just start to cook. Add soup stock or water to cover and simmer, briefly, until medium-well cooked.
Add the paprika, other seasonings, and Wondra to the mix. When beginning to thicken, add the sauerkraut. Simmer until hot, adding more water or stock if necessary. Add the sour cream just before serving. Adjust the thickness with either more sour cream, or more water & stock.