This is a dish from my childhood in Russia. The stew is made of cabbage, carrots, bell peppers, kielbasa (or hot dogs), and tomato paste with some basic spices. You can also add pickles and olives. The potatoes are skinned and boiled, then lightly flavored with butter and salt. You want them pretty plain to act as a base for the savory stew.
Oh my lard soylanka is my absolute favorite soup! I love to add pickle brine and sour cream to mine. I never thought of making it into a stew, great idea to switch it up.
It hits the same spot for me, and you can definitely add sour cream here. It would be heavenly.