Classic Cajun Shrimp Bisque

1. In a large saucepan, melt the margarine and add the onion, garlic, celery, and pepper. 2. Cook until vegetables are softened. 3. Add to them the flour paprika, cayenne, and pinch of mustard. 4. Stir lightly. 5. Slowly pour in the stock, stirring until ingredients are combined well. 6. Drop in the bay leaf and thyme spring and increase heat. 7. Bring mixture to a boil and then reduce the heat to a steady simmer for about five minutes, stirring occasionally. 8. Once broth is thickened, add the shrimp and simmer for an additional five minutes – or until the shrimp have curled and turn pink. 9. Taste for seasoning and add salt and pepper accordingly.