Breakfast was a meal.
When Ann Kelso demanded tea and cake while locked up in Newstead Abbey, the Fourth Doctor expressed that cake, as a breakfast option, was distasteful. He retracted that part of her request. (AUDIO: The Enchantress of Numbers)
When the Seventh Doctor, Ace and Hex went to breakfast in London, he ordered a cadimonel prusket. When he realised it was unavailable on Earth, he asked for a bacon sarnie instead. (PROSE: Six Impossible Things Before Breakfast)
The renegade Time Lady Iris Wildthyme once shared breakfast with President Abraham Lincoln on the White House lawn in the 1860s, after saving the United States from "Martian invaders" for the third time. (AUDIO: The Panda Invasion)