Borscht

Ingredients

• 4 fresh beets (about 1 1/2 pounds, without stems and greens), un-peeled
• 1/4 cup plus 3 tablespoons red wine vinegar, plus more for passing at the table
• 2 tablespoons plus 2 teaspoons kosher salt
• 3 tablespoons unsalted butter
• 2 stalks celery, halved lengthwise and thinly sliced crosswise
• 2 leeks (white part only), halved lengthwise and thinly sliced crosswise
• 4 cloves garlic, minced
• 1/4 teaspoon caraway seeds
• 1/4 head Savoy cabbage (about 8 ounces), cored, cut into 1-inch wedges, and shredded
• 3 parsley sprigs
• 3 fresh thyme sprigs
• 1 bay leaf
• One 16-ounce can whole, peeled tomatoes (with liquid), roughly chopped
• 9 cups beef broth
• Freshly ground black pepper
• 1/4 to 1/3 cup sour cream
• 2 tablespoons chopped fresh dill