Heat a splash of oil in a saucepan. Fry sausages for 5-7 minutes or until brown. Remove sausages from the heat and leave to sit on paper towels.
Add onions and red bell peppers to the same saucepan and cook until soft (add more oil if necessary). Add tomato puree and cook on medium/high heat for 1 minute.
Pour in double cream, season with salt, paprika and Cajun seasoning, stir and bring to a boil. Leave to cook on a low heat for 8-10 minutes.
Add cooked pasta, prawns, peas and cook for 6-8 mins on low
Then remove from heat and add chopped parsley and grated parmesan.