Cook the pasta in salted boiling water for as long as the packet states.

Meanwhile, heat some cooking oil in a large frying pan over a medium to high heat. Cook the onion for about 5 minutes, or until it softens.

Add in the tomato paste, Cajun spice, and king prawns. Cook for 2 more minutes, stirring occasionally, until the prawns are pink.

Pour in the vegetable stock and add the cream cheese. Stir well and bring to a simmer.

Drain the pasta but keep back some pasta water in case you need it. Add the pasta to the sauce and toss together until it’s creamy. If it needs more liquid then add some pasta water. If it’s too watery, then just keep stirring it and the starch from the pasta will thicken it up.

Dish it up, and finish with some more grated parmesan, if you like.