High Street Place is a $30 million food hall coming to the atrium connecting 160 Federal St. and 100 High St. in downtown Boston, featuring celebrity chef Tiffani Faison and the first brick-and-mortar location for a popular Mexican food truck.  Architecture firm Gensler and Philadelphia-based Groundswell Design Group designed the 20,000-square-foot space, which will feature 20 vendors when it opens in the fall of 2019.