“Romaine Catholic” (romaine = Roman Catholic) and “lettuce pray” (“let us pray”) are connected puns.
     
“Lettuce Pray (...) Is that the Romaine Catholic Church?” was posted on the newsgroup alt.feminism on January 9, 2002. “Or mayhaps a ‘Romaine Catholic,’ as in ‘Lettuce Pray’” was posted on the newsgroup alt.atheism.satire on July 19, 2002. “How do the Romaine Catholics start a prayer? With the words ‘lettuce pray’” was posted on Twitter by 0-= on May 30, 20108. “What did the Romaine Catholic say? Lettuce pray” was posted on Reddit—3amjokes on March 1, 2022.
   
   
Google Groups: alt.feminism
“You shouldn’t brag about being beautiful…btw, I’m more beautiful than You!”
Allisson
Jan 9, 2002, 10:26:29 AM
(...)
>————————-
>Archbishop of the Church of the Holy Cabbage
>Lettuce Pray
>————————-
 
Is that the Romaine Catholic Church?
 
Google Groups: alt.atheism.satire
But she IS killfiled.
Earle Jones
Jul 19, 2002, 12:15:23 PM
(...)
> > Was Lani EVER Roman Catholic? Perhaps we could consider her “Roamin’
> > Catholic?”
>
> Or mayhaps a “Romaine Catholic,” as in “Lettuce Pray.”
   
Google Groups: alt.atheism
Communion for Vegan/Vegetarians
DanielSan1977
Mar 8, 2008, 2:12:57 PM
(...)
> Lettuce pray.
>
I don’t know about you, but I don’t particularly ascribe to the Romaine
Catholic Church…
   
Twitter
Michael Hartney
@MichaelHartney
“Lettuce pray.” - a Romaine Catholic priest and I’m so sorry you guys
8:41 AM · Oct 5, 2012·Twitterrific for iOS
     
Twitter
Rachael Rice
@rachaelricebowl
Because we are Romaine Catholics, lettuce pray.
9:36 PM · Oct 24, 2012·Twitter for iPhone
 
Twitter
Palmer Jankens
@pjanky
“Lettuce pray” - overheard at a Romaine Catholic mass.
2:54 AM · Oct 12, 2013·Twitter for iPhone
   
Twitter
Eric ⓥ Lindstrom
@TheSkepticalV
A priest hunts down a salad. Lettuce prey. He is Romaine Catholic, after all.  #foodpuns #govegan
10:44 PM · Jun 23, 2014·Twitter for iPhone
   
Twitter
K T Cat
@ktcat
In the Romaine Catholic Church, we start Mass with “Lettuce pray.”
You’re welcome.
1:56 PM · Aug 2, 2015·TweetCaster for Android
   
Twitter
olivia
@livmaass
Lettuce pray.
For we are Romaine Catholic.
4:10 PM · Aug 9, 2017·Twitter for iPhone
   
Twitter
Caleb Driedger
@caleb_driedger
Welcome to the Romaine Catholic Church. Lettuce pray.
2:30 AM · May 12, 2018·Twitter for iPhone
       
Twitter
0-=
@_KiloLimaSierra
How do the Romaine Catholics start a prayer?
With the words ‘lettuce pray’
1:23 PM · May 30, 2018·Twitter for Android
 
Twitter
❁ Mad 🇺🇦🇺🇸
@MaddsAndBarry
why did the priest say “lettuce pray” during church
he was a romaine catholic
hire me10:15 PM · Jan 9, 2019·Twitter for Android
   
,a href=“https://twitter.com/thepoetcries/status/1386443339466170371”>Twitter
sunny side up 🌻
@thepoetcries
i’m a romaine catholic; lettuce pray
6:13 PM · Apr 25, 2021·Twitter for Android
     
Twitter
Wayne Ferrebee
@ferrebeekeeper
Replying to @cottoncandaddy
You must join the Romaine Catholic Church.
Lettuce pray.
4:00 PM · Oct 9, 2021·Twitter for Android
   
Reddit—3amjokes
Posted by u/thewittslc March 1, 2022
What did the Romaine Catholic say?
Lettuce pray.