A pie was a type of baked good containing a sweet or savoury filling.
Known pie fillings included pumpkin (PROSE: Goodwill Toward Men), blueberry (COMIC: The Glutonoid Menace), pecan (PROSE: Christmas in Toronto), mince (TV: Last Christmas), fish, meat, chicken, (TV: Thin Ice) steak, ale, (PROSE: The Party in Room Four) and limes. (PROSE: Deleted Scene from 'Iris Wildthyme and the Key Lime Pie 2 Time' - 'Part 3: The Stones of Blood')
Lou Lombardo's Pan-Traditional Pie Emporium was Lou Lombardo's pie shop on Yquatine. The Eighth Doctor, Fitz and Compassion once met there for a meal. (PROSE: The Fall of Yquatine)
Christmas dinner at the Los Angeles Midnight Mission included pumpkin pie. (PROSE: Goodwill Toward Men)
The TARDIS' food machine could produce blueberry pie-flavoured pills. (COMIC: The Glutonoid Menace)
In a dream world experienced by Clara Oswald and the Twelfth Doctor, induced by the dream crabs, an illusion of Danny Pink offered mince pies on Christmas Day. (TV: Last Christmas)