Bring a medium saucepan of salted water to the boil. Add the Fusilli and begin to cook according to packet instructions.
In a frying pan over a medium heat spray the base with a little Frylight then add the onions. Begin to fry them gently for around 4-5 minutes. Season with pepper and add the olives.
Add the mackerel fillets in spicy tomato sauce. Stir everything together and turn the heat down low. Add 2-3 tbsp of the pasta water to the pan to loosen up the sauce and make it silkier.
Drain off the pasta once it's cooked and then season with a bit of pepper and a tiny pinch of salt. Turn off the heat under the mackerel sauce. Add the drained pasta to the sauce and the gently combine everything together.
Serve up in immediately and enjoy! :)
