polish sausage (kielbasa) soup

Ingredients

• 2 tablespoons butter
• 1 1/2 pounds fresh or smoked kielbasa
• 1 cup chopped onion
• 2 cups chopped celery
• 4 cups shredded cabbage
• 2 cups sliced carrots
• 1 - bay leaf
• 1/2 teaspoon dried thyme
• 2 tablespoons white vinegar
• 3 cups beef broth
• 2 cups water
• 3 cups peeled and chopped potatoes
• - salt and pepper, to taste
• - chopped fresh dill - optional garnish