Boil halibut 20 minutes,remove all skin and bones. Blend flour and butter,add milk and seasoning cook in double boiler until smooth sauce. Cool. Add beaten egg yolks,and last fold in stiffly beaten egg white. Place in well-buttered mold,set in pan with little hot water. Bake 30 minutes @350. Turn on heat chop plate, fill center with very small buttered potato balls.