I lived in Scotland for a couple years in 1967-69 [ Ardintiny(sp?), Argyle] and don't really recall the food being much differtent than the rest of GB.
I bought a book sometime back "The Scots Kitchen" by F.Marian McNeil. First edition in 1929, my copy says printed in 1971. I have never cooked any thing from it.
I guess since it's my only, it is my favorite Scots cookbook.