Oysters Bienville Fijian-style

Ingredients

 * 1/4 cup butter or margarine
 * 3 tablespoon flour
 * 1 clove garlic
 * 1 tablespoon onion juice
 * 1 tablespoon Worcestershire sauce
 * 1/4 teaspoon celery seed
 * 1 2-ounce can mushrooms
 * 3/4 cup liquid
 * 18 medium boiled shrimp
 * 1½ pints medium oysters
 * Parmesan cheese

Directions

 * 1) To make sauce, melt butter and add flour, garlic, onion juice, Worcestershire sauce, celery seed and liquid. Add mushrooms and shrimp.
 * 2) Cook until thickened. Put oysters in saucepan and simmer just until edges curl.
 * 3) Drain. Put oysters on cleaned oyster shells. Cover each with sauce mixture.
 * 4) Sprinkle each with cheese. Place on tray covered with rock salt.
 * 5) Broil for about 5 minutes or until bubbly.