Cook the pasta as per packet instructions and put aside to cool down.
In a medium-sized pot, with a little oil, fry the chopped onion and green + yellow pepper, just until the onions become see-through, do not brown them.
Turn the heat down and add the tomato sauce, oil and vinegar. Mix together and heat it up.
Add the sugar and curry, keep mixing it regularly for about 5 minutes.
Pour over the Fusilli and combine. Let it cool and put it in the fridge (Once cooled, a lid can be put on top to stop it from drying out)