The press notes say: "MidAtlantic will celebrate the intersection of the region’s Pennsylvania Dutch cooking and the produce market stalls that ran from the top of Market Street to the banks of the Delaware River in the 1700s."
Here's the menu and drink list. Some ye olde names, such as Schuylkill fish house punch, the standpipe and shrub.
Most prices are $18 and under, and there's a nightly three-course $30 dinner, as well as nightly specials (hot dogs on Wednesdays, seafood stew on Fridays, etc.).