Cut prawns into bite size pieces if they are too big, if they are small prawns, you can use them whole.
Mixed the prawns with celery, onion, mayonnaise, Worcestershire sauce, salt and pepper.
Spread mixture in a butter casserole dish.
Combine bread crumbs and melted butter or margarine then sprinkle over casserole.
Bake in a 350 °F oven for 30 minutes or until lightly brown.
Garnish with lemon sliced and parsley and serve hot.