Heat oven to 375 degrees. Saute onion and green pepper in 3 Tablespoons of butter or margarine until tender in saucepan. Add flour and mix until smooth. Stir in Half and Half gradually; cook over medium heat, stirring constantly until sauce thickens. Stir in a small amount of hot sauce into egg yolks; add to remaining sauce in pan and heat 2 minutes. Remove from heat and add cayenne, salt, Worcestershire sauce, mustard and chives. Mix well. Stir in crab meat. Spoon crab mixture into 6 buttered ramekins, custard cups or 1 quart casserole. Combine bread crumbs and 2 Tablespoons melted butter or margarine; sprinkle on crab mixture. Bake 20-25 minutes or until crumbs are golden brown. Makes 6 servings.