Sausage with Kale and Potatoes

Ingredients

• 1 1/2 bunches kale
• 3/4 lb Reduced-fat kielbasa or other smoked sausage, cut
• 1 large yellow onion, chopped
• 1 clove garlic, minced
• 2 large baking potatoes, peeled and sliced 1/4 inch
• 2 cups homemade or low-sodium canned chicken broth
• 1 tbsp balsamic vinegar
• 1 tsp salt (optional)
• 1/2 tsp freshly ground black pepper
• 1 large can (14 1/2 oz.) can whole tomatoes with liq