Add the spaghetti to a large pot of boiling, salted water. Let it boil, stirring frequently, until the noodles are still firm but easy to chew
In the meantime, heat a large pan over medium-high heat. Add 1 tablespoon of butter followed by the prawns and fry for about 2 minutes. Set aside once cooked
Add the remaining butter and sauté the onion and garlic until translucent and fragrant respectively
Add the seasoning along with the diced bell peppers and chopped basil. Stir well and cook until peppers are crisp tender
Stir in the tomato paste until well incorporated then add the cooked prawns back in and let it cook for about 1 minute
Reduce the heat to low and pour in the cream, stirring well. Let it simmer for 2 minutes
Drain the cooked spaghetti and immediately toss it into the creamy prawn sauce. Serve straight away and enjoy!