[Galaxity]

I Just looked up photos of agave sisalana and it actually has a palm like trunk/stem about the size of what is shown being served.

Whereas the agave americana doesn't and seems to grows it's leaves right out from the ground.

https://en.m.wikipedia.org/wiki/Sisal

Edit: well I guess after looking further I shouldn't say agave americana doesn't have a trunk coming out of the ground. Probably all agaves could if they grow long enough. But it does look like this snack is the trunk of an agave.