Here is a recipe from Mrs Beeton's book of HOUSEHOLD MANAGEMENT
3 hard-boiled eggs
1/2 a lb of sausage meat
1 egg
breadcrumbs
6 croûtes of fried bread. (Note: These are cut in rounds the same size as the half scotch egg shown in the picture and look very attractive)
METHOD. - Let the eggs become quite cold, remove the shells, and cover each one completely with sausage-meat.
Coat them carefully with beaten egg and breadcrumbs, and fry in hot fat until nicely browned.
Cut each egg in half, dish them cut side upwards on the croûtes of fried bread besprinkled with chopped parsley, and serve either hot or cold.
Time: 3/4 hour. Sufficient for 6 persons
I haven't tried them so I can't verify how good they are.
Marion