Soup’s on! This low-calorie Southwest Chicken Soup is a favorite recipe from the kitchen of Chris Freytag. Not only is it low-calorie, but it’s packed with flavor and comes together in a pinch! This recipe is also dairy free and gluten free, unless you want to add a little shredded cheese or sour cream at the end. Each serving has less than 300 calories, but 13 grams of protein, meaning it will fill you up without filling you out.