“When does a sandwich cook?”/“When it’s bakin’ lettuce and tomato.”

“Bacon” sounds like “bakin’.” A riddle on the bacon, lettuce and tomato sandwich (BLT) is:
   
Q: When does a sandwich cook?
A: When it’s bakin’ lettuce and tomato.
   
The joke was posted on Twitter on July 3, 2017.
   
     
Twitter
i promote hmu‏
@ilyBETTYBOOP
Replying to @ImperfectlyZay
@Getwiththis yea BLT= Bakin, lettuce & tomato’s thats wat they call it here hahaha
7:37 PM - 19 Oct 2011
 
Twitter
Victor Hall‏
@VicHall3
When does a sandwich like to cook?
When its Bakin lettuce
😐
3:37 PM - 3 Jul 2017 from Atlanta, GA
 
Twitter
Zach.Grubb™‏
@Zach_Grubb54
when does a sandwich cook? when it’s bakin’ lettuce tomato
9:34 PM - 3 Jul 2017
 
Twitter
6/04 〽️ 🍾‏
@Lyle_Has_Spoken
When does a sandwich cook?
When it’s bakin lettuce and tomato.
9:51 PM - 3 Jul 2017 from Gadsden, AL
 
Reddit—Jokes
When does a sandwich cook?
submitted July 8, 2017 by Deonteaus
When it’s bakin’ lettuce and tomato.
 
Reddit—3amjokes
When does a sandwich cook? self.3amjokes
Submitted August 2, 2017 by Scamperillium
When it’s bacon lettuce and cheese
 
Reddit—Jokes
When does a sandwich cook?
submitted August 2, 2017 by SuperNortix
When it’s bakin’ lettuce and tomato.
 
Twitter
Jeff MacMillan‏
@CWUSportsRadio
GM Jeff’s Dad Joke of the Day.
Q:When does the sandwich cook itself
A:When it’s Bakin’ lettuce and tomato
#FunOnTheRadio #dadjokes
9:35 AM - 3 Aug 2017 from Ellensburg, WA