A simple, one-pot lentil soup loaded with vegetables that keeps well and reheats beautifully.
Heat the oil in a large pot and cook the onion, carrots, and celery until softened, about 8 minutes.
Add the garlic and cumin and stir for a minute.
Add the lentils, tomatoes, and broth and bring to a boil.
Lower the heat and simmer for 25 minutes, until the lentils are tender.
Stir in the kale and cook 5 more minutes. Season and serve.