1. Cook fettuccine in boiling water in a large saucepan following packet directions. Drain and keep warm.
2. To make sauce, place onions, garlic, chillies and water in saucepan over a medium heat and cook for 3-4 minutes or until onion is soft. Stir in tomato puree and bring to the boil. Reduce heat and simmer for 4-5 minutes or until sauce thickens. Serve over pasta.