Food bar
A food bar, (AUDIO: The Beginning) also known as a nutrition bar (PROSE: The Eleventh Tiger) was a food item found on Gallifrey.
When using the food machine aboard the Doctor's TARDIS for the first time, Susan ate a food bar with textured flavours of the sort found at most workplace refractories on the planet. (AUDIO: The Beginning)
Shortly after their arrival on Skaro, the First Doctor used the food machine to make some food bars for Barbara Wright and Ian Chesterton, tasting like bacon and eggs. (TV: "The Dead Planet")
According to Ian Chesterton, the nutrition bars from the food machine were "no match for the real thing". (PROSE: The Eleventh Tiger)