Borscht

Name: Borscht
Prep time: 20 min
Cook time: 2 h 30 min
Total time: 2 h 50 min
Cuisine: American
Ingredients: Extra virgin olive oil or vegetable oil; 1 1/4 pound slice of bone-in beef shank with a lot of meat (or 1 pound of stew beef), excess fat trimmed; 1 large onion, chopped (about 1 1/2 cups); 8 cups beef broth or beef stock, divided 4 cups and 4 cups; 4 large beets (about 1 1/2 pounds), peeled, chopped; 4 carrots (1 lb), peeled, chopped; 1 large russet potato (.75 lb), peeled, cut into 1/2-inch cubes; 2 cups thinly sliced cabbage; 3/4 cup chopped fresh dill; 3 tablespoons red wine vinegar; 1 cup sour cream; Salt and freshly ground black pepper to taste