If you're using raw meat, season the fillet with salt and fry on each side for 3-4 minutes then rest for 10 minutes before slicing them.
Slice the onion and celery, then sauté these in a little oil.
Meanwhile, chop the garlic, carrots, zucchini and green beans and cut them into bite-sized pieces.
Add the garlic to the onion, stir for one minute, then add the other chopped vegetables .
Gently sauté under cover for 5 to 10 minutes, then add the stock and the tomato purée. Cook for 10 minutes while cutting the duck meat into bite sized pieces.
Add the meat to the stewed vegetables and cook for 2-3 minutes to warm thorough. Season with salt and pepper to your liking.
Meanwhile, cook the pasta in boiling water, then drain.
Serve the pasta, tossed with the duck and vegetables.