Heat the oil in a large non stick pan, add the onion and cook over a gentle heat for 2-3mins or until just starting to soften.
Increase the heat and add the turkey mince and cook for 1 minute, breaking up any lumps with a wooden spoon.
Add the garlic, carrot, celery, chopped tomatoes, tomato puree, water, herbs and seasoning to taste. Bring to the boil then reduce the heat, and simmer for 20-25mins.
Cook the spaghetti according to instructions on the packet, Drain well then transfer to a warm serving bowl, spoon over the Bolognese sauce and serve with freshly grated Parmesan.
Top tips: Add any vegetables you have, such as mushrooms, red pepper, sweetcorn ? they all help to boost your recommended 5-a-day. And for an extra flavour boost add a splash of red wine or Worcestershire sauce.