Place chopped tomatoes, basil, garlic and ½ tablespoon olive oil in a bowl. Cover; leave to marinate for 1 hour.
Fill a large pot with water and add salt; bring to the boil. Add pasta and cook until al dente, about 10 - 12 minutes. Drain.
Transfer tomato mixture to frying pan and add salt. Add the hot pasta and remaining olive oil. Don't be tempted to stir; cover and turn up the heat. Cook for 5 minutes shaking the pan back and forth 2 or 3 times. Remove from the heat and stir together.