1.Heat oil in a frying pan over low heat; cook chillies, garlic and basil, stirring for 2 minutes or until chilli softens. Add crushed tomatoes; increase heat to medium, simmer for 10 minutes or until thickened slightly. Season.
2.Meanwhile, cook pasta in a large saucepan of boiling water until tender; drain, reserving ¼ cup cooking water. Stir pasta and parmesan into tomato mixture. Add enough reserved cooking water to coat the pasta.
3.Serve topped with extra parmesan and 1 tablespoon small fresh basil leaves.