Sandwich

From Tardis Wiki, the free Doctor Who reference

A sandwich was piece of food consisting of two pieces of bread with a filling of some sort, originating on, although not limited to, Earth.

References

The Doctor ate one of the Master's sandwiches during a sword fight with him. (DW: The Sea Devils)

Ace orders "four bacon sandwiches and a cup of coffee." whilst in London during the Shoreditch Incident. (DW: Remembrance of the Daleks)

Charley Pollard, Viola Learman, Major Ferdinand and the Eighth Doctor made and ate sandwiches whilst being held by the Daleks in Mariah Learman's palace in New Britain. (BFA: The Time of the Daleks)

Florm Rox Fey Fenerill-Slam Slitheen was eating a sandwich, while in her human disguise as Janine. Sarah Jane Smith later recalls to that moment, while trying to decipher the weaknesses of the Raxacoricofallapatorians. (SJA: Revenge of the Slitheen)