This soup is from Russia and Poland.

Ingredient
* 10 cups canned beef broth
* 1 1-pound meaty cross-cut bone-in beef shank slice
* 1 large onion, quartered


* 4 large beets, peeled, chopped
* 4 medium carrots, peeled, chopped
* 1 12- to 14-ounce russet potato, peeled, cut into 1/2-inch pieces
* 2 cups thinly sliced savoy cabbage
* 3/4 cup chopped fresh dill
* 3 tablespoons red wine vinegar
* 1 cup plain nonfat yogurt

Preparation
Bring 6 cups broth, beef shank, and onion to boil in large pot. Reduce heat, cover, and simmer until meat is tender, about 1 hour 30 minutes. Transfer meat to work surface; trim fat, sinew and bone and discard. Chop meat; cover and chill. Cool broth slightly. Chill uncovered in pot until cold, at least 4 hours and up to 1 day.

Spoon fat from top of chilled broth and discard. Add remaining 4 cups canned broth, beets, carrots, and potato; bring to boil. Reduce heat, cover, and simmer until vegetables are tender, about 30 minutes. Stir in cabbage and 1/2 cup dill; cook until tender, about 15 minutes. Season with salt and pepper. Stir in vinegar. Ladle soup into bowls. Top with yogurt and remaining 1/4 cup dill.