This happened in the late 80s, I lived in a somewhat remote locations where bread, cheese and lunchmeat were expensive. My mother decided to save time by making our brown bag lunches in bulk, so she went through a period of freezing sandwiches for us. The sandwiches were white bread based, Safeway stores brand wonderbread, with a slice of bologna and 1 piece of sliced american cheese. Sometimes a dollop of mayo would be added- sometimes not. Her theory that they would be unfrozen by lunchtime was not solid science. I remember eating them from the outside in, leaving a frozen solid core. These are the beige memories of being a child in the 1980s.