A rich, meat-free take on a classic that uses lentils for a deeply satisfying, high-fiber sauce over whole grain pasta.
Heat the oil and cook the onion, carrots, and celery until soft, about 10 minutes.
Add the garlic, oregano, and tomato paste and stir for a minute.
Add the lentils, crushed tomatoes, and broth. Bring to a boil, then simmer for 30 minutes until the lentils are tender and the sauce is thick.
Meanwhile, cook the whole wheat pasta until al dente.
Season the sauce, then serve over the pasta.