Preheat oven to 400 degrees F. Spray a large Dutch oven (or other oven-safe pot) with cooking spray.
Place cabbage, onion, potatoes, sausage, garlic, salt, and diced tomatoes in the pot.
In a separate bowl, whisk together balsamic vinegar, chicken broth, and condensed soup. Pour over cabbage mixture and gently stir to combine.
Cover with a lid and bake for 45 minutes, or until vegetables are tender. I like to stir the pot halfway through the cooking time just to ensure even cooking.
Garnish with parsley just before serving.
