Bread

Bread was a food found on Earth.

In a Hooverville in 1930 New York, Solomon broke up a fight over a loaf of bread. (DW: Daleks in Manhattan)

In London in 1952, the Xhinn used drugged bread as part of their plan to enslave humanity. (PDA: Amorality Tale)

In the 1970s, Mark gave Sarah Jane Smith some pure bread. (DW: Invasion of the Dinosaurs)

On Oseidon, Harry Sullivan's android duplicate gave the Fourth Doctor and Sarah Jane bread and water. (DW: The Android Invasion)

In 1996, shortly after his regeneration, Amelia Pond served the Eleventh Doctor bread with butter. He threw it out the front door in disgust with the cry, "And stay out!" (DW: The Eleventh Hour)

Other references
Edward Watkinson wrote an essay; Beer Before Bread? A Theory Revisited expounding a theory that civilisations developed beer before bread. (BNA: Walking to Babylon)

On the Worldsphere, saRa!qava spent some of her time perfecting baking bread. (NA: The Also People)

Satthralope considered the ciabatta (that was Dorothée's) to be like sort of rough bread Shobogans baked in ember fires: chewy and richly flavoured with herbs. (NA: Lungbarrow)

On Hyspero, Sam Jones and Gila traded an etheric beam locator for some bread. (EDA: The Scarlet Empress)