for the white sauce
4 tbsp butter
2 tbsp flour
1 c milk
1 tsp mustard
1/2 tsp worcestershire sauce
1/2 tsp horseradish
salt
2 tsp lemon juice
1 tbsp mayo
1 lb crab
for topping
1/2 c fresh bread crumbs
2 tbsp melted butter

Preheat oven to 400. Lightly butter a shallow 2 qt baking dish.
White sauce: melt the butter in a small sauce pan. stir in the flour and cook stirring constantly for 1-2 min. Slowly wisk in the milk bring the mixture to a boil and cook until mixture thickens (2-3 min) Remove from the heat and stir in mustard, wor sauce, horseradish, salt, lemon juice and mayo.

place the crab in the prepared dish.pour in white sauce and stir gently/

in a small bowl toss the bread crumbs with butter. sprinkle over the casserole. bake in oven for 10 min NO Longer.