Peel and finely chop the onion. Peel, wash and finely dice the potatoes. Clean, wash and slice the celery. Wash and halve the tomatoes. Cut cabanossi into slices.
Place the lentils in a sieve and rinse briefly. Heat the oil in a pot. Fry the cabanossi briefly and remove. Sauté onion, potatoes and celery in the frying oil. Add lentils and stock, bring to the boil.
Season with cumin and thyme. Cook everything over medium heat for 15 minutes. Add the tomatoes and sausage 3 minutes before the end of the cooking time. Season to taste with salt and pepper. Flatbread tastes good with it.