In a large pot, sauté the chopped onion in olive oil. Add the lamb and chicken pieces only (do not add the merguez at this stage).
Season with salt, pepper, and ras el hanout.
Brown the meat well, then add the water and the hot chili pepper.
Cover and cook for about 15 minutes, then add the carrots and turnips to the broth.
Once the chicken is fully cooked, remove it, as lamb requires a longer cooking time.
Add the zucchinis, chickpeas, and tomato paste. Mix well and let simmer.
Cook the merguez sausages separately in a skillet.