I have used this recipe I found online
One Red Cabbage , well washed and shredded.
Two potatoes, pealed and diced.
One onion, finely chopped.
Hot water (according to quantity of cabbage)
Butter
Salt & Pepper for seasoning
Sour cream
Drop the butter in a heated pot, and add the onion and stir until glossy and tender.
Add the cabbage and stir well, cook until cabbage is soft.
Add water until it covers the tip top of the cabbage, and add the potato cubes.
Add salt and be a bit generous with the pepper.
Cover, and cook on low fire until the whole soup looks soupy, and the potatoes are done.
Serve with drizzles of sour cream.