Cook pasta in a large saucepan of boiling salted water until al dente.
Meanwhile, pour cream into large frypan. Cook over medium heat stirring constantly until just about boiling. Reduce heat and add herbs, salt, chilli, peppers, onions and parsley. Simmer 7 to 8 minutes or until thickened.
Stir in seafood cooking until prawns is no longer transparent. Stir in cheeses, blending well.