1/4 c. finely chopped onions
1/4 c. butter
1/4 c. flour
2 c. milk
1 tsp. salt
2 tsp. lemon juice
1/4 tsp. dill weed
Dash of pepper
2 tbsp. spicy brown mustard
1 (10 oz.) pkg. frozen codfish or other fresh or frozen fish
1 1/2 or 2 c. cooked, cubed potatoes
1 1/2 c. soft bread crumbs
1/4 c. melted butter

Saute onion in butter. Stir in flour. Add milk; cook and stir constantly until thickened. Add salt, lemon juice, dill weed, pepper, and mustard. Cut thawed fish into cubes and add to sauce along with potatoes. Pour into a 2 quart casserole. Mix bread crumbs with melted butter and sprinkle on top. Bake at 350 degrees for 30 minutes.