4 cups vegetable broth
In a slow cooker, combine broth, diced tomatoes, tomato sauce, onion, garlic and salt and pepper.
Cover and cook on low 5 -6 hours; add tortellini and cook on low for 20 additional minutes. If soup seems too thick, add water 1/2 cup at a time to thin. Garnish with cheese. Serve with Creamy Corn Muffins.