This hearty lentil and vegetable soup is a perfect healthy meal for any day of the week. Made with lentils, carrots, celery, onions, and tomatoes, this soup is packed with nutrients and fiber. Lentils are a great source of protein and iron, making this soup a great option for vegetarians and vegans. The vegetables add a variety of vitamins and minerals, making this soup a great way to get your daily dose of nutrients. Serve with a slice of whole-grain bread for a complete meal.