Cabbage Soup with sprigs

3 tablespoons butter 1 tablespoon olive oil 8 cups thinly sliced cored green cabbage 1 large onion , chopped 8 large fresh thyme sprigs 6 cups chicken broth 1[...]

1 cup chopped onion 8 cups low-fat vegetable broth 5 cups shredded green cabbage 2 large potatoes , diced 8 tablespoons diced lean ham 1 teaspoon crushed dill[...]