(covers information from several alternate timelines)
Breakfast was a meal traditionally consumed during the morning hours.
When the USS Voyager was thrown back to the year 1996, Tuvok and Tom Paris were temporarily stranded with Rain Robinson, a scientist from the time period. Tuvok bought fast food for breakfast one morning, much to Robinson's amusement. (VOY: "Future's End, Part II")
One of Benjamin Sisko and Michael Webb's demands to Detective Preston in September 2024 was to provide breakfast for the inhabitants of Sanctuary District A. The line for breakfast in the District was usually extremely long. (DS9: "Past Tense, Part II")
During their time aboard the USS Enterprise-D, Captain Jean-Luc Picard and Doctor Beverly Crusher often shared breakfast. (TNG: "The Perfect Mate", "The Chase") Crusher usually made an attempt to plan something different and unique despite preferring something simple. She did not realize that Picard also desired a simpler breakfast; this fact was one of many she learned while the two were connected through psi-wave devices on the planet Kesprytt in 2370. From then on, they agreed on coffee and croissants for their meal. (TNG: "Attached")
Miles O'Brien's ideal breakfast typically consisted of corned beef, eggs, oatmeal, and muffins. In contrast, his wife Keiko ate kelp buds, plankton loaf, and sea berries every morning as a child, and tried introducing it to Miles shortly after their wedding in 2367. Miles believed the meal was more befitting a fish. (TNG: "The Wounded")
Odo and Elim Garak began to have breakfast together in 2371 on Odo's request, despite the fact the Changeling did not eat. In early 2372, they had breakfast and discussed the lack of information from the Cardassian Union, which was suffering from political difficulties. Odo would sometimes create a coffee cup with his hand and drink it, thus reabsorbing the liquid back into his body and allowing him to share in the dining experience. (DS9: "The Die is Cast", "The Way of the Warrior")
While Voyager was stranded in the Delta Quadrant, Neelix was responsible for cooking and serving breakfast to the crew in the mess hall. He often began preparing the meal quite early, sometimes ninety minutes before breakfast was to begin. (VOY: "Prototype")
Rom usually had pureed beetle for breakfast, but later had Miles O'Brien's breakfast of choice – two eggs, three strips of bacon and a side of corned beef hash. He later switched to the night shift breakfast – pancakes, butter and a side of sausage and pineapple. (DS9: "The Assignment")
In 2372 in an alternate timeline, Libby served Ensign Harry Kim eggs for breakfast, but they got cold because Kim, disturbed by the shift in the timeline, could not concentrate on eating. (VOY: "Non Sequitur")
On Talax, it was traditional to share the history of a meal as a way to enhance the "culinary delight". In 2373, Neelix shared this with fact Lieutenant Tuvok while preparing some Porakan eggs, though Tuvok insisted that he "preferred not to hear the life history of his breakfast". (VOY: "Flashback")
In 2374, when Lieutenant B'Elanna Torres was having a bad day, and one of the things that contributed to this was that she overslept and then the acoustic inverter in her sonic shower blew out, meaning that she didn't have time for breakfast. (VOY: "Day of Honor")
In late-2375, Gul Dukat, disguised as Anjohl Tennan, told Solbor that he would be eating breakfast on the balcony, at a temple on Bajor. When asked if she would like anything, Kai Winn said she was not hungry. (DS9: "The Changing Face of Evil")
In 2284, James T. Kirk had decided to go out of retirement and back into Starfleet. Knowing his lover at the time, Antonia, would not be happy with that decision, he made her breakfast consisting of toasted bread and Ktarian eggs spiced up with dill weed. The scenario was repeated when he was trapped in the Nexus with Jean-Luc Picard. (Star Trek Generations)
Background Information Edit
The script of the Star Trek: Deep Space Nine episode "Paradise Lost" includes a scene in which Jake Sisko brings his father breakfast before leaving on a shuttle from Bracketville Spaceport to the Utopia Planitia Fleet Yards on Mars. This scene was not present in the finished episode.