Cajun Shrimp without chard sauce

3 cups water for cooking shrimp 1 pound prawns medium, 18 to 24, peeled 3 tablespoons lemon juice fresh 2 tablespoons olive oil pure 1/2 cup yellow onion[...]

3 tablespoons butter 1 onion , finely chopped 2 stalks celery , finely chopped 1 garlic clove , minced 1/8 teaspoon dry mustard 1/8 teaspoon cayenne pepper 2[...]

3 tablespoons butter 1 onion , finely chopped 2 stalks celery , finely chopped 1 garlic clove , minced 1/8 teaspoon dry mustard 1/8 teaspoon cayenne pepper 2[...]