Chop the onion, celery, basil, parsley and one garlic clove very finely (I put them in a hand-held food processor) Cut the tomatoes in halves or quarters.
Put the tomatoes, chopped vegetables, oregano and olive oil into the bowl, saving a little parsley for serving.
As soon as the pasta is cooked, strain it and add it to the bowl with the tomato mixture and a little more olive oil if it seems dry. Mix everything together well.
You can also make this recipe with other types of long pasta such as spaghetti, linguine, tagliolini etc
The cooking times do not include the time needed to marinate the tomatoes or boil the water for the pasta.