Flat-Belly Soup 1 This vegan soup recipe is chock-full of colorful vegetables. All those veggies give this soup plenty of fiber, upping the satisfaction factor while keeping calories low, which can aid in weight loss and lead to--yes--a flatter belly. Vibrant turmeric adds a golden color to the flavorful broth, while cumin and ginger give it a bright, fresh finish. And the best part? This healthy soup recipe takes only 20 minutes, start to finish!