1In a heavy pot, heat oil, add onion and cook until onion just starts to soften, add garlic and cook 2 - 3 minutes more.
2Cut kielbasa into 1" slices and add to pot. Add prepared vegetables - except potatoes - and add the water, tomatoes, salt and pepper.
3Cook uncovered for 5 minutes over medium heat. Cover and cook 10 minutes longer, then add potatoes. Cover and cook for 15 minutes more or until cabbage is tender.
4Meanwhile, heat 2 Tbsp oil and stir in flour. Cook. stirring until it turns golden brown. Stir in paprika and remove from heat. Remove one cup of liquid from soup pot and whisk into oil roux. Continue whisking while adding tomato sauce until smooth. Stir this into soup and heat for 5 minutes more.