INGREDIENTS: * 1lb precooked whitefish (baked, boiled, or fried) bones removed * 2tbsp butter * 3tbsp flour * 1.5cup milk * 1/2tsp salt * 1/4tsp pepper * 1tsp Worcestershire sauce * egg yolk, well beaten * 1/2cup grated cheese * 1/4cup bread crumbs DIRECTIONS: 1. Flake the cooked fish and remove all the bones. 2. Melt butter in sauce pan, blend in flour and milk. 3. Add salt, pepper, and Worcestershire sauce and remove from heat. 4. Stir in the egg yolk and the fish flakes. 5. Place the mixture in a buttered casserole dish. 6. Sprinkle grated cheese on top of fish and bread crumbs on top of cheese. 7. Bake in the oven for approximately 20mins at 375F.