Chef Jose Andres just tweeted:
"In. @Zaytinya we have an special dish with a sauce from Yemen called Zhug! Just Order it, and the dish in on us! #imamuslim"
I found the photo below on Zaytinya's instagram feed, not sure that this is the dish with zhug he's offering, but it sure looks good. And some on social media are suggesting that customers should donate their savings to immigrant causes.