Scotch egg [SEP] country of origin
. Further confusion is added by the large trade in eggs from Scotland in the 19th century, and which sometimes involved dipping eggs in a lime powder - a process (possibly) also known as 'scotching'. 
Serving.
Scotch eggs are a common picnic food. In the United Kingdom packaged Scotch eggs are available in supermarkets, corner shops and motorway service stations. Miniature versions are also widely available, sold as "mini scotch eggs" "savoury eggs", "picnic eggs", "party eggs"
Scotch egg
A Scotch egg consists of a hard or soft-boiled egg wrapped in sausage meat, coated in bread crumbs and baked or deep-fried.
Origin.
There are a number of different theories about the origins and etymology of Scotch eggs, and no firm conclusion. The OED gives the first instance of the name as 1809, in an edition of Maria Rundell's "A New System of Domestic Cookery." For her, as with most other writers of the time, they were a dinner