Roasted Potato Garlic Soup with Kale and Sausage

Name: Roasted Potato Garlic Soup with Kale and Sausage
Ingredients: 1 head of garlic; 1 pound loose sweet Italian sausage; 2 tablespoons vegetable or canola oil; 1 medium yellow onion diced; 3 large carrots peeled and diced; 2 stalks of celery diced; 6 cups chicken broth or stock; 1 bay leaf; 2 pounds Yukon gold potatoes peeled and chopped into 1-inch pieces; salt and black pepper; 1 tablespoon Italian seasoning; 1/2 cup half and half heavy cream, milk, or other milk alternative; 3 cups chopped kale; 2 tablespoons fresh parsley