Chicken Tomato Tortilla Soup

Heat oil in a large saucepan over medium heat. Add onion and garlic and cook, stirring, until softened, about 3 minutes. Add broth, soup, chicken, beans, corn, cumin and chili powder. Bring to a simmer and cook for 5 minutes. Stir in lime juice. Serve with sour cream, avocado and tortilla chips, if desired.