Shrimp and Artichoke Casserole

Ingredients:

• 6½ tablespoons butter
• 4½ tablespoons flour
• ¾ cup of milk
• ¾ cup heavy cream
• 2 lb cooked/peeled shrimp
• ½ lb fresh mushrooms, sliced
• 1 can (250 grams drained weight) artichoke hearts, drained
• ¼ cup freshly grated cheese
• ¼ cup dry sherry
• 1 tablespoon Worcestershire sauce
• salt & pepper
• paprika powder