A hearty lentil soup can be made by simmering lentils with diced carrots and fresh spinach in vegetable broth. Season with spices like cumin and garlic for added flavor. This soup is filling, rich in fiber, and roughly 300 calories per serving. You can also create a lentil carrot salad by mixing cooked lentils and carrots with spinach, a light vinaigrette, and serving it chilled.