Soup is satisfying when you’re on a diet, especially as the weather turns cooler. Even better, soup can help you slim down: studies show that soup makes you feel fuller and more satiated than other types of food. Researchers think that it may have to do with the high water content. Also, when soup is piping hot we eat it more slowly and that gives us time to notice when we feel full. Try one of these quick, super-satisfying, healthy soup recipes tonight, such as black bean soup, seafood chowder, chicken soup or gazpacho.