One of the oddities about the Lettuce Entertain You Enterprises restaurant empire is that, for all the various concepts the company operates, there isn’t a single Mexican restaurant, at least not since Hat Dance was closed many years ago to make room for Nacional 27 (given N27′s longevity, not a bad move).

Well, all that will change sometime in the middle of March, when Lettuce unveils an as-yet-to-be-named Mexican concept.

It will be an informal cantina and taqueria with a mesquite-fired wood grill, and a fairly traditional menu that will feature organic chicken and gulf shrimp. The beverage program will include housemade sangria and “out of this world” margaritas. And for folks in a hurry, a walk-up taco stand up front will let customers grab and go, street-food style.

There is a catch. The restaurant is opening in Las Vegas, on the site of Lettuce’s Cafe Ba-Ba-Reeba outpost on the Vegas strip. That restaurant will close on February 15 to make room for the new concept.