Boil the spaghetti in salted water for about 2 minutes.
In the meanwhile stir fry the bacon with the onions in olive oil in a frying pan.
Add the red chilli, the cherry tomatoes and the mixed tomatoes.
Check the salt.
Strain the spaghetti and put them in the frying pan with the sauce.
Sauté and add the Parmesan. Serve immediately in a nice dish.