Update as of late 2022: Google removed the ability to have these kinds of variable inputs completely disabling this kind of usage, so this is no longer feasible.
Since IFTTT is still not working with the Asana service, I replaced my simple Google Assistant > Asana “Task to Self” applet described above with an even simpler one (and also simpler than @Amin_Lakhani’s immediately above because it doesn’t require 1) needing to use both IFTTT and Zapier, and 2) needing to authorize GSheets access):
First, create this applet in IFTTT:
Then set up a filter (in Gmail in my case) to forward messages that match this signature to x@mail.asana.com. That’s enough to create simple voice reminders, etc. as task titles (albeit with some junk in the body courtesy of IFTTT).
I still hope @Ross_Grambo will keep the pressure up with them though!
Larry