Sauté onion in margarine until fragrant. Add remaining vegetables and continue cooking over medium high heat for 5-7 min. until they are soft.
Mix tomatoes and contents of the sachet of Knorr Naturally Tasty Spaghetti Bolognese.
Bring to the boil and cook for 15 minutes.
Add vegetables and cook for 3 more minutes.
Serve pasta with the sauce, topped with torn basil.