In a large frypan over medium heat cook onion in olive oil for 2 minutes. Add garlic, green capsicum, celery and cook for an additional 5 minutes. Stir in tomatoes, tomato paste, dry cider, salt and pepper and bring to a boil. Add pasta, mixing in well. Cover and let simmer for 15 minutes.
Remove lid, add prawns and cook for 5 minutes. Adjust seasoning, if necessary.