I was driving through Germany a number of years ago and stopped for lunch. We bought some ham "sandwiches" which I guess were ham butties as it was ham and butter on a roll. As a kid in the 40s, people always buttered the bread before they added the inards. That custom seems to have gone out here in the States. My personal favorite, that my Dad taught me to eat, is a raw onion sandwich with katsup. My mouth is watering. Don't eat one if you're going to go be with people.