This savory soup has a cool refreshing flavor making it ideal for fall or spring, when the weather is still cool but not cold. This recipe for Key Lime Soup is made with a garlic, oregano, and coriander spiced shredded chicken and a warm broth flavored with lime and grapefruit juice as well as onions, bell peppers, and tomatoes. Serve the soup with fried tortilla strips or crushed tortilla chips for a bit of crunch with each spoonful.