Peel and Devine shrimp. Set aside in refrigerator. Saute chopped onions and green onions until wilted, about 45 minutes. Add flour; stir well. Slowly add whipping cream, stirring into flour and onion mixture. Add seasonings and tasse. Cook 10-15 minutes on low heat. Add shrimp, cook 10-15 minutes on medium heat. Serve over cooked fettuccine.
Cajun Country -- New Iberia, Louisiana