Cook the pasta in salted boiling water for 2 minutes less than the packet states. Save some pasta water before draining.
Heat some cooking oil in a large frying pan over medium to high heat and add the sausage slices. Cook until they are golden, then push to one side of the pan.
Toss in the red pepper, then cook for 2–3 minutes until it softens.
Add the garlic and the prawns and cook for 1 minute, then stir in the tomato paste and the Cajun spice.
Pour in the chicken stock and double cream. Bring to the boil, then simmer for a few minutes until the sauce thickens slightly.
Add the drained pasta and toss it all together. Add a splash of pasta water if it needs loosening.
Stir in the parmesan, and chopped parsley, then season to taste.
Dish it up with some more grated parmesan, and enjoy.