Congratulations to temz. Not only did you get the restaurant name right, but you got the location as well. I was eating at the Grey Dog on University Street over at Union Square.
The dish is the ahi tuna tacos, a sensible combination of thick, creamy avocados paired with thick slices of medium rare tuna in a soft taco wrap.
This article from the Village Voice Archive was posted on October 2, 2012