Normal dungeon slimes are completely inedible and somewhat toxic to eat. In rare instances when a slime grows very large the toxins get so dilute that the slime’s natural secretions become edible if unpalatable.
If the secretions of a slime of more than 10 HD are collected and dried they form a pellet the size of a chicken’s egg. This pellet can be eaten and provides as much sustenance as a days worth of rations. For each 10HD one pellet can be prepared each day. The pellets last 100 years in any conditions before disintegrating. The pellet re-hydrates when exposed to saliva and chewed. It takes on the taste and consistency of mucus. If the Judge wants a DC 5 Fortitude save can be imposed to successfully choke down the slime ration.
Far away in an unnamed dungeon a foul warlock named Nedis had sequestered himself to protect a foul curse that had been set upon the world. In this dungeon was a giant slime named Cornix. Nedis discovered that he could sustain himself on the dried drippings that slowly oozed out of the pool that Cornix was in.