Gefilte fish is a dish that many Jewish people eat with horseradish.
   
“I though gefilte fish existed as a vehicle for horseradish?” was posted on the newsgroup soc.culture.jewish on April 13, 2000. “Gefilte fish is used as a vehicle for horseradish” was posted on flickr on October 26, 2006. “Gefilte fish is a vehicle for horseradish” was posted on Twitter by Travis Seifman on May 26, 2012. “Gefilte fish is just a vehicle for horseradish” was posted on Twitter by Alex Freeman on March 27, 2021.
 
“A bagel is just a vehicle for cream cheese” is a similar saying about Jewish foods.
   
   
Wikipedia: Gefilte fish
Gefilte fish (/ɡəˈfɪltə fɪʃ/; from Yiddish: געפֿילטע פֿיש‎, “stuffed fish”) is a dish made from a poached mixture of ground deboned fish, such as carp, whitefish, or pike. It is traditionally served as an appetizer by Ashkenazi Jewish households. Historically it consisted of a minced-fish forcemeat stuffed inside the intact fish skin.
       
Google Groups: soc.culture.jewish
[Halacha] About rice, beans, and corn on Pesach
Adelle Stavis
Apr 13, 2000, 3:00:00 AM
(...)
I though gefilte fish existed as a vehicle for horseradish?
     
flickr
Taken on October 26, 2006
Karen
Gefilte fish and horseradish
Gefilte fish is used as a vehicle for horseradish.
 
Twitter
Travis Seifman
@toranosukev
QotD: Quoth
@Dr_Ballon “Gefilte fish is a vehicle for horseradish.”
1:18 PM · May 26, 2012·Twitter for iPhone
   
Twitter
Kouign Amann Amarth
@JonJCohen
Gefilte fish is merely a vehicle for horseradish. Nothing more. The hotter the horseradish, the better.
8:08 PM · Mar 25, 2013·Twitter for iPhone
   
Twitter
Melanie Gilman
@mlnglmn
Replying to @thejonanshow
@1337807 Gefilte fish is a vehicle for horseradish, preferably in 1:1 ratio. It’s underwhelming/gross otherwise. Hope you had that pleasure.
7:54 PM · Apr 5, 2013·Twitter for Mac
   
Twitter
Just Steve From Delco
@sec1968
Replying to @nuclearcarly
@nuclearcarly @Brookie425 Gefilte fish is a vehicle for horseradish
11:24 PM · Oct 23, 2014·Twitter for iPhone
     
Google Books
The Value of the Particular:
Lessons from Judaism and the modern Jewish experience:
Festschrift for Steven T. Katz on the occasion of his seventieth birthday
By Steven T Katz, Michael Zank, Ingrid L. Andersonand Sarah Leventer
Leiden, Netherlands & Boston, MA: Brill
2015    
Pg. 279:
According to him, “What the Jews don’t tell you is that gefilte fish is merely a vehicle for horseradish.” One might also wonder why Jews need to eat so much horseradish.
 
Google Books
Will You Won’t You Want Me?:
A Novel
By Nora Zelevansky
New York, NY: St. Martin’s Griffin
2016
Pg. 43:
“Try the gefilte fish! It’s a vehicle for horseradish!”
 
Twitter
Holly M. Paddock
@hollyhock
Replying to @jhoffman
Gefilte fish is just a vehicle for horseradish.
9:00 PM · Oct 2, 2016·Twitter for Android
   
Twitter
Daniel Rubin
@DanielYRubin
Replying to @asilverleib and @speechboy71
I use horseradish liberally. But that’s the point of gefilte fish—it’s a delivery vehicle for horseradish. Like lettuce and salad dressing.
9:19 PM · Jul 10, 2019·Twitter for iPhone
     
Twitter
Ariella Minden
@AriellaMinden
Replying to @ShammaBoyarin
Gefilte fish is merely a vehicle for horseradish. In this essay I will…
7:36 AM · Nov 3, 2019·Twitter for iPhone
 
Twitter
Phyllis Kosen
@pkosen
Replying to @dy1anonymous
Gefilte fish are a fine vehicle for horseradish.
11:30 PM · Sep 29, 2019·Twitter for iPad
 
Twitter
Dave Walker
@DrDave91
Replying to @jh_swanson
I like gefilte fish because it’s a great vehicle for horseradish.
8:23 PM · Feb 20, 2020·Twitter for iPhone
 
Twitter
Andy Stone
@andymstone
Replying to @cam_joseph @CahnEmily and @JoshSchwerin
love gefilte fish, but now that I think about it, maybe just as a vehicle for horseradish. agreed on the prevailing mediocrity of some kugels.
9:18 AM · Sep 16, 2020·Twitter Web App
     
Twitter
⏣ Jimmy Novak Protection Squad ⏣
@ajcrowlor
Replying to @cracktheglasses and @ManicZebra
gefilte fish is just a vehicle for horseradish lbr
12:04 AM · Dec 12, 2020·Twitter for Android
 
Twitter
Alex Freeman
@Afree1121
Replying to @jaketapper
Gefilte fish is just a vehicle for horseradish
11:11 PM · Mar 27, 2021·Twitter for iPhone
 
Twitter
Brian Levenson
@brian_levenson
Gefilte fish: delicious dish or merely a vehicle for horseradish?
3:18 PM · Apr 4, 2021 from Redwood City, CA·Twitter for iPhone