Smapp

Smapp was a substance used for food. It was served in a dish at Dex's Diner, a restaurant located in CoCo Town on the galactic capital planet Coruscant, before the eatery was destroyed in 19 BBY. Sometime before then, Dexter Jettster, the Besalisk owner of the diner, served smapp with hot barium liquid as a Pantoran plate special for lunch and dinner on Zhellday for 8.5 credits.

Behind the scenes
Smapp first appeared in Dining at Dex's, a 2009 Star Wars Hyperspace exclusive article written by Gregory Walker in the form of an in-universe menu. The article does not specify whether smapp is a creature, a plant, or something else.