Heat the oil in a large, heavy-based saucepan and
fry the bacon until golden over a medium heat. Add
the onions and garlic, frying until softened.
Increase the heat and add the minced beef. Fry it
until it has browned. Pour in the wine and boil
until it has reduced in volume by about a third.
Reduce the temperature and stir in the tomatoes
Cover with a lid and simmer over a gentle heat for
1-1½ hours until it's rich and thickened, stirring