Pantoran plate specials were a set of meals and dishes served at Dex's Diner which were known for being cheaper than other meals at the diner. It contained three sections on the menu, breakfast specials, daily soups, and lunch specials. They were named for the Pantoran species.
Behind the scenes
Pantoran plate special are a reference to real life blue plate specials as well as George Lucas's blue skinned Pantoran character Notluwiski Papanoida. They were originally to be called Wroonian plate specials, the original species given to Papanoida, but this was changed after Star Wars: The Clone Wars episode Trespass retconned this.
Sources
Dining at Dex's on Hyperspace (article) (content obsolete and backup link not available) (First mentioned)
Dining at Dex's: The Story Behind the Story on Narb Flick Created Leffingites — Gregory Walker's StarWars.com Blog (original site is defunct)
In other languages