Boil the water for the spaghetti and cook re packet instructions.

Heat 3 Tbsp of olive oil in a frying pan. Add the guianciale (or bacon) and sauté until browned.

Chop the fresh peperoncino (or add the dried flakes).

Turn the heat to low and add the peeled, deseeded and chopped fresh tomatoes, or tomato pulp.

Let the sauce simmer until the pasta is cooked.

Drain the pasta and add it to the sauce.

Grate pecorino cheese on top, and serve immediately.