Potato Soup with Smoked Sausage and Kale

Name: Potato Soup with Smoked Sausage and Kale
Prep time: 10 min
Cook time: 25 min
Total time: 35 min
Cuisine: American
Ingredients: 1 tablespoon butter; 2 tablespoons olive oil; 1 yellow onion (finely diced); 3 cloves garlic (finely chopped); 1 package (14-ounces ) smoked sausage ((such as kielbasa or andouille), sliced into 1/4-inch rounds); 4 cups torn kale leaves; salt and fresh ground black pepper (to taste); 1 sprig fresh rosemary; ½ teaspoon dried thyme; 3 cups cubed potatoes; 4 cups low-sodium fat-free chicken broth; 2 cups milk (I used Soy milk, see notes below for more options)