Lightly mix in the egg yolk, onion, parsley, lemon, Worcester, and then the milk and breadcrumbs. Gently combine until the mixture comes together.
Check the seasoning and lastly whisk and fold in the egg whites.
Spoon into a buttered loaf mould.
Bake at 180˚C/360˚F for 45 minutes, until golden brown on top.
Let the loaf sit for 5 minutes, then unmould, and serve sliced, accompanied by the sauce.
Notes
Use chopped herbs such as tarragon, dill, parsley, according to your preference in the sauce.Other vegetables, such as corn can be used to add interest.