Region, a new, upscale, pan-Asian restaurant from the owners of Unicorn in the Financial District opens its doors tomorrow at 139 Steuart Street, in the former Mexico DF spot. Thrillist was the first on the case, and has a few menu details, like Beijing duck carved tableside, bacon tiger prawns in a crab sauce, and cubed filet mignon with onions, Szechuan pepper and seared rice cake. There's a full bar with a cocktail program by Victoria D'Amato-Moran of Cent'anni Cocktails, and in addition to some twists on classics she's got a few new ones like the Dragon Tattoo (vodka, Strega, lime and five-spice powder). We'll have more details and photos for you on opening day. [Thrillist, Earlier] Update: It turns out tomorrow night's opening isn't set in stone, and due to computer glitches they're delayed until the 29th or later.