Place the pasta, chicken stock, garlic, onion, roasted pepper, tomatoes, mixed herbs and chilli flakes in a large pot over a medium heat. Stir everything together and make sure the pasta is covered by the liquid.
Cover the pot and bring to the boil. Simmer for about 12 minutes, stirring occasionally. Once the pasta is cooked to your liking then take the pot off the heat and stir through the cream cheese and double cream if using.
Season with black pepper and top with fresh basil to serve.