1.Heat oil in a large, heavy based saucepan on high. Add bacon, onion, celery, carrot and garlic. Cook, stirring occasionally, 5 minutes, until vegetables have softened.
2.Add mince. Cook 5 minutes, until well browned, breaking up lumps with back of a spoon. Stir through tomatoes, wine, tomato paste, milk and bay leaves. Reduce heat; simmer 15 minutes.
3.Meanwhile, cook pasta in boiling, salted water according to packet directions. Serve pasta topped with sauce and grated parmesan.
Adding milk to a bolognese sauce is traditional in northern Italian cuisine. Alternatively, you could use brown sugar instead. Bolognese can be frozen. Remove 3-4 hours before required and thaw in fridge.