A croissant was a food item often eaten for breakfast.
Kate Yates once ate half a croissant on the way to work. (PROSE: I Am A Dalek)
The Thirteenth Doctor stated that she prefered croissants for breakfast. (TV: Arachnids in the UK)
In 2501 croissants were served to the warders of Detention Centre 6. (PROSE: The Monsters Inside)