This riddle has been edited significantly from the original. The clues and goal are largely the same, but I changed the final objective from a location to a food, as the location was largely contrived. The clues were only edited to add clarity and reflect this change. As the core of the riddle is intact, I refrained from creating a new Question.
Served in the halls of Ler, Sar, and Lin,
In the palaces of Pot and Lini too!
Delivered to the booth of Tas, Berg, and Hon,
Eaten cold by Chaels at the peaceful pond
Served to the dience by the thousands,
and cannibalized by lazy thousands more
Nibbled by tics and onks as they sit silently,
and Dha shows many the way
Eaten by Dr. Tine during his grizzly surgeries,
Munched by the modern mutilator Yaf
Fed to rots who learn speech and tors who learn speeches,
and a favorite of the King Sley's in Sin City
What is this popular food?
Addendum to the first clue:
But never served to Ump or Ama,
And despised by Deau and Eron