Taco Tuesday: Ask about these off-menu street tacos

The waitress at Cobian’s in Cypress sees me flipping through the six-page menu. It’s the third time she’s come to the table to take my order, but I’m still not ready.  
“What are you looking for?” she asks. 
“I’m looking for these,” I say, lifting up my phone to show her a photo from the restaurant’s Yelp page. It’s a picture of old-school carne asada tacos, the kind you get from a food truck, but I don’t see them