Peel and finely chop the onions. Heat the olive oil in a large pan on a medium heat and slowly soften the onions, taking care that they don’t burn.
Once softened, add the garlic, basil, oregano, salt, pepper and tomato puree to the pan and cook over a medium heat for a few minutes, stirring constantly.
Add the mince and fry until it is all browned and well combined. Add the chopped tomatoes and bring the mixture to the boil. Reduce to a low heat and simmer for 1½ hours.
Bring a large pan of salted water to the boil and cook the spaghetti according to the packet instructions. Serve out and top with the sauce. Add grated Parmesan and garlic bread if desired.
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