In a skillet, saute scallions, thyme, basil, pepper and cayenne pepper in olive oil for about 5 minutes. Add in minced garlic, chicken stock, sugar, worchestershire sauce, hot sauce and mix thoroughly over low to medium heat. Stir in cream cheese and cream or milk, blend well and continue cooking over low heat till it thickens (approx. 30 minutes).
While sauce is cooking, saute shrimp in some butter until almost cooked (pink, but not totally opaque). Add shrimp to sauce and cook for another few minutes. Add in the cooked pasta and parmesan cheese.
Recipe by Creative Kitchen at http://creativekitchenadventures.com/2011/12/07/cajun-shrimp-pasta-the-12-days-of-holiday-bloggers/