Peel, wash and dice the potatoes. Peel and chop onions and garlic. Fry onions, garlic and potatoes in hot oil. Chop the tomatoes in the tin and add to the potatoes. Cook for 10-15 minutes. Clean, wash and cut the leek into rings.
Cut Cabanossi into slices. Drain the beans. Add leek, cabanossi and beans to the stew. Season with salt, pepper and marjoram and cook for another 10 minutes. Sprinkle with fresh marjoram if desired