For the broth
01 -
6 cups (1.4 L) chicken stock
02 -
1 lb (450 g) smoked Polish kielbasa, sliced into rounds
03 -
1 small onion, diced
04 -
3 cloves garlic, minced
05 -
1 tablespoon neutral oil or butter
06 -
1 bay leaf
07 -
1 teaspoon dried marjoram
08 -
1 1/2 lb (680 g) potatoes, peeled and diced
09 -
Salt and black pepper, to taste
For the tangy finish
10 -
1 1/2 cups (360 ml) buttermilk, or 1 1/2 cups zakwas (fermented rye sour)
11 -
2 tablespoons all-purpose flour
12 -
2 to 3 tablespoons prepared horseradish, plus more to taste
For serving
13 -
4 to 6 hard-boiled eggs, halved
14 -
Fresh chives or dill, chopped