“How do you start a rice pudding race?”/“Sago.”

A riddle about sago pudding is:
   
Q: How do you start a rice pudding race?
A: Sago (say go).
 
This riddle version as been cited in print since at least 2007.
     
“How do you start a pudding race?”/“Sago” as been cited in print since at least 1978. Sago pudding is not a rice pudding, but this has sometimes become part of the riddle.
   
 
Wikipedia: Sago pudding
Sago pudding is a sweet pudding made by boiling sago with either water or milk and adding sugar and sometimes additional flavourings. It is made in many cultures with varying styles, and may be produced in a variety of ways.
 
In Malaysia, sago gula melaka is a sago pudding made by boiling pearl sago in water and serving it with syrup of palm sugar (gula melaka) and coconut milk.
     
27 November 2007, Northern Echo (Darlington, UK), “Eating Owt” by Mike Amos, pg. 20:
. . and finally the bairns wondered if we knew how you start a rice pudding race. Say go.
   
Twitter
Richard_Honey
@Richard_Honey
Replying to @tonyblackburn
@tonyblackburn How do you start a rice pudding race.?... sago!
2:52 PM · Jan 6, 2011·TweetDeck
   
Twitter
DeeJay
@Bonkkkers
Replying to @twowitwowoo
@twowitwowoo how do you start a rice pudding race?  sago.
2:11 AM · Dec 19, 2011·TweetDeck
 
Google Books
Crap Dad Jokes:
Because Dads aren’t as funny as they think they are
By Ian Allen
London, UK: Portico Books
2013
Pg. ?:
How do you start a rice pudding race?
Say go.
   
27 July 2014, Liverpool (UK) Echo, “Sunday Smile,” pg. 10:
HOW do you start .a rice pudding race? Sago - George Hayes (@georgehayes1948
   
Twitter
Daz
@darrenbizzle
How do you start a rice pudding race? ..... Sago
You’re welcome
3:41 PM · Jun 30, 2015·Twitter for Android
 
Reddit—Cleanjokes
Posted by u/cwwspurs May 30, 2020
How do you start a rice pudding race?…
sago