Bread

Bread is a food found on Earth. Shortly after his regeneration, Amelia Pond served the Doctor bread with butter. He threw it out the front door in disgust with the cry, "And stay out!" (DW: The Eleventh Hour)

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

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

Consistency of bread
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)

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

Uses of bread
Bread could be used to make Sandwiches, something the Doctor and his companions ate on several occasions. (DW: The Sea Devils, BFA: The Time of the Daleks)