Prishic was a spice that was among the ingredients in Neelix's Jibalian omelette.
While Neelix was attempting to perfect his six-spice Jibalian omelette, he experimented by adding less Prishic, among other changes, before realizing that he what it needed was a seventh ingredient, Nimian sea salt. (VOY: "Prototype")
According to the script, prishic was pronounced "PRIH-shik".
According to the Star Trek Encyclopedia, 4th ed., vol. 2, p. 181, this spice was native to the Delta Quadrant.
According to the Star Trek Cookbook (p. 268), prishic was described as "a yellow moonweed unique to Rinax."