Drop the spaghetti into boiling salted water.
In a large frying pan, combine the oil, anchovies, garlic and chilli and fry for 1 minute. Add the tomatoes, olives and capers, and cook for a couple of minutes. Taste and adjust the seasoning.
When the spaghetti is ready, drain and add to the frying pan together with the parsley. Pour over the olio santo and stir-fry for 1 minute, u