A cheese sandwich was a sandwich containing cheese. Variations of this sandwich included the cheese and pickle sandwich and the cheese and tomato sandwich.
The Third Doctor ate a plateful of cheese sandwiches that Captain Hart had brought for Jo Grant, leaving her only a lettuce garnish. (TV: The Sea Devils)
While hiding in the Doctor's TARDIS, Klov Dreb Fotch Passameer Day Slitheen III stole, among other food, cheese sandwiches. (WC: Who Ate All the Biscuits?)
On the day he died, Donald Babinger ate a cheese sandwich, which he shared with a pigeon. (PROSE: Apollo 23)
Variants
In 4202, the Fifteenth Doctor ordered a ham and cheese toastie, along with a pumpkin latte, from the Time Hotel. (TV: Joy to the World)