Step 1

Heat the olive oil in a Dutch oven or heavy pot over medium heat. Add the onion and garlic; cook, stirring occasionally, until soft and glistening, about 6 minutes. Add the paprika and 1 teaspoon salt; cook until the oil turns deep red, about 1 minute. Add the flour and cook until just toasted, 30 more seconds. Immediately whisk in 4 cups water. Add the kielbasa, carrots, parsnips, potatoes and 1 1/2 teaspoons salt.

Step 2

Bring the soup to a boil, then reduce to a simmer; cover and cook until the vegetables are tender and the broth has thickened, about 20 minutes. Add the vinegar and season with pepper.

Step 3

Combine about half of the parsley with the sour cream in a small bowl and season with salt and pepper. Ladle the stew into bowls; top with the remaining parsley, a dollop of herbed sour cream and a sprinkle of paprika. Serve with bread.