Lentil soup is a nutritious and filling option that can be made in a short amount of time. Start by sautéing onions, carrots, and celery in a pot until they are soft. Add in rinsed lentils, vegetable broth, and bring to a boil. Reduce heat and simmer until the lentils are tender. Season with spices like cumin, paprika, and bay leaves for added flavor. This hearty soup is packed with protein and fiber, making it a satisfying meal on its own or served with crusty bread.